82812. Maryland Geological Survey.   Maryland, Devonian, Plates.   Maryland Geological Survey, 1913, Maryland Geological Survey, plates with explanations.   Hardbound, some usual cover wear, minor signs of age, text and plates in very good condition.    $100.00

82810. Maryland Geological Survey.   Maryland, Lower Devonian, Text.   Maryland Geological Survey, 1913, Maryland Geological Survey, 560 pages with 15 plates and 17 figures.   Hardbound, some usual cover wear, minor signs of age, text in very good condition.    $38.00

82813. Maryland Geological Survey.   Maryland, Silurian.   Maryland Geological Survey, 1923, Maryland Geological Survey, 794 pages with 8 plates and 27 figures.   Hardbound, minor cover wear, front hinge weak, minor signs of age, text in very good condition.    $56.00

111176. Cloos, E.   Structural Geology of Howard and Montgomery Counties.   Maryland Geological Survey, 1964, The Geology of Howard and Montgomery Counties, pages 216-261 with 71 figures and 45 plates.   Softbound, xlib, good or better condition.    $13.00

111180. Gernant, R. E.   Paleoecology of the Chotank Formation (Miocene) of Maryland and Virginia.   Maryland Geological Survey, 1970, Report of Investigations, Number 12 : 90 pages with 44 figures and 1 plate.   Softbound, xlib, good or better condition.   Original publication, not a modern reprint.   $13.00

106633. Cleaves, E. T. et al.   Towson Quadrangle: Geologic and Environmental Atlas.   Maryland Geological Survey, 1974, Map, 5 sheets.   Softbound, signed by the author, very good condition.   Original publication, not a modern reprint.   $13.00