123505. Wetmore, A.   Five New Species of Birds from Cave Deposits in Porto Rico.   Biological Society of Washington, 1920, Proceedings, Volume 33 : pages 77-82 with 2 plates.   Softbound, stapled text with previous owners stamp, good plus or better condition.    $8.00

136826. Wetmore, A.   Scientific Survey of Porto Rico and the Virgin Islands. Volume IX- Part 4, The Birds of Porto Rico and the Virgin Islands, Psittaciformes to Passeriformes.   New York Academy of Sciences, 1927, Scientific Survey of Porto Rico and the Virgin Islands, Volume 9, Part 4 : pages 412-598 with 4 plates.   Softbound, home made archival cover, text and plates in very good condition.   Original Publications, not a modern reprint.   $26.00

92113. Nolla, J. A. and Arroyo, R.   Inheritance in Nicotiana. I. A Study of the Glaucous and the Yellow Characters in N. tabacum L. and The Utilization of Waste Molasses in the Production of I. Acetone and Butanol, II. Noram Butyric Acid.   The Agricultural Experiment Station, Puerto Rico, 1934, The Journal of Agriculture of the University of Puerto Rico, Volume 18, Number 4 : .   Softbound, minor signs of use and age, text in good or better condition.    $11.00

44266. Bartsch, P.   The First Johnson-Smithsonian Deep-Sea Expedition to the Puerto Rican Deep.   Smithsonian Institution, 1934, Explorations and Field-Work of the Smithsonian Institution in 1933, Publications 3235 : pages 7-14 with 12 figures.   Text extracted from larger volume, minor signs of use and age, very good condition.    $4.00

92114. Geigel, A. R. and Nolla, J. A.   Effect of Boron on the Growth of Certain Green Plants and Studies on Disease Resistance I. A Tobacco Resistant to Ordinary Tobacco Mosaic.   The Agricultural Experiment Station, Puerto Rico, 1935, The Journal of Agriculture of the University of Puerto Rico, Volume 19, Number 1 : .   Softbound, some signs of use and age, text in good or better condition.    $15.00

92112. Huyke, R.   A Farm Management Study of 60 Dairy Farms in Puerto Rico, 1935-36.   The Agricultural Experiment Station, Puerto Rico, 1939, The Journal of Agriculture of the University of Puerto Rico, Volume 23, Number 3 : .   Softbound, minor signs of use and age, text in good or better condition.    $13.00

79895. Fox, I.   A New Tyroglyphi Mite from Puerto Rico.   The Biological Society of Washington, 1950, Proceedings of the Biological Society of Washington, Volume 63 : pages 205-208 with 1 plate.   Softbound, self-wrap, minor signs of use and age, text in very good condition.    $4.00

124775. Smith, C. L.   Two new clinid blennies (Malacoctenus) from Puerto Rico.   Museum of Zoology, University of Michigan, 1957, Occasional Papers of the Museum of Zoology, Number 585 : 17 pages with 1 plate and 2 tables.   Softbound, very good condition.   Original publication, not a modern reprint.   $4.00

75899. Carr, M. S. and Dutton, C. E.   Iron-ore resources of the United States including Alaska and Puerto Rico, 1955.   United States Geological Survey, 1959, U.S. Geological Survey, Water-Supply Paper, B1082C.   Softbound, minor signs of age, very good condition.    $38.00

105321. USGS.   Geology of Isla Mona, Puerto Rico, and notes on age of Mona Passage.   United States Geological Survey, 1959, USGS Professional Paper, P 317C : .   Softbound, very good condition.   Original Publication, Not a Modern Reprint.   $13.00

105319. USGS.   Geology of Isla Mona, Puerto Rico, and notes on age of Mona Passage.   United States Geological Survey, 1959, USGS Professional Paper, P 317C : .   Softbound, minor signs of use, very good condition.   Original Publication, Not a Modern Reprint.   $8.00

105648. USGS.   Shoreline features and Quaternary shoreline changes, Puerto Rico.   United States Geological Survey, 1959, USGS Professional Paper, P 317B : .   Softbound, minor signs of use, very good condition.   Original Publication, Not a Modern Reprint.   $17.00

105646. USGS.   Geology of the San Juan Metropolitan Area, Puerto Rico.   United States Geological Survey, 1959, USGS Professional Paper, P 317A : .   Softbound, minor signs of use, very good condition.   Original Publication, Not a Modern Reprint.   $17.00

74137. United States Geological Survey.   Inventory of published and unpublished sediment-load data, United States and Puerto Rico, 1950-1960.   United States Geological Survey, 1962, U.S. Geological Survey, Water-Supply Paper, W1547.   Softbound, xlib, minor signs of use, text in very good condition.    $11.00

111686. Ferguson, F. F. and Richards, C. S.   Fresh-Water Mollusks of Puerto Rico and the U. S. Virgin Islands.   American Microscopical Society, 1963, Transactions of the American Microscopical Society, Volume 82, Number 4 : pages 391-395.   Softbound, stapled text as issued, very good condition.    $3.00

75636. Woodward, T. H. and Heidel, S. G.   Inventory of published and unpublished chemical analyses of surface waters in the continental United States and Puerto Rico, 1961.   United States Geological Survey, 1964, U.S. Geological Survey, Water-Supply Paper, W1786.   Softbound, minor sun fading to cover, text in very good condition.    $26.00

27552. Lidiak, E. G.   Petrology of Andesitic, Spilitic, and Keratophyric Flow Rock, North-Central Puerto Rico.   Geological Society of America, 1965, Bulletin, 76 : 57-88, 11 figures and 3 plates.   Reprint, Stapled text, Printed covers, minor signs of use and age, very good condition.    $7.00

99619. Gonzales, J. G. and Bowman, T. E.   Planktonic Copepods from Bahia Fosforescente, Puerto Rico, and Adjacent Waters.   Smithsonian Institution, 1965, Proceedings of the Unites States National Museum, Volume 117 : pages 241-304 with 21 figures.   Softbound, very good condition.   publication date uncertain.   $6.00

72790. Nelson, C. H. and Hopkins, D. M.   Geology of Isla Desecheo, Puerto Rico, with notes on the Great Southern Puerto Rico fault zone and Quaternary stillstands of the sea.   United States Geological Survey, 1972, Geological Survey Professional Paper, P739.   Softbound, xlib, usual signs of use, text in very good condition.    $15.00

65554. Little, E. L. et al.   Trees of Puerto Rico and the Virgin Islands. Second Volume.   United States Department of Agriculture, 1974, Agricultural Handbook, Number 449 : pages 1-1024 with 750 illustrations.   Hard bound, xlib with all the usual signs, text in very good condition.    $100.00

69094. Kiester, A. R. et al.   Habitat Selection Behavior of Three Species of Anolis Lizards.   The Ecological Society of America, 1975, Ecology, Volume 56, Number 1 : pages 220-225 with 3 figures.   Reprint, minor signs of use, text in very good condition.    $3.00

72795. Gomez-Gomez, F. and Heisel, J. F.   P813U Summary appraisals of the Nations ground-water resources; Caribbean region.   United States Geological Survey, 1980, Geological Survey Professional Paper, P813U.   Softbound, xlib, minor signs of use, text in very good condition.    $15.00

75954. Editor.   The Journal of Agriculture of the University of Puerto Rico.   , 2008, , Volume 9, Number 1-2 :.   Softbound, very good condition.    $11.00