100166. Alberti, G. K.   Nowakiidae (Dacryoconarida) aus dem Hunsruckschiefer von Bundenbach (Rheinisches Schiefergebridge).   Senckenbergischen Naturforschenden Gesellschaft, Frankfurt, Germany, 1982, Senckenbergiana Lethaea, Volume 63, Number 5/6 : pages 451-463 with 6 figures and 2 plates.   Softbound, text extracted from a larger volume, complete in good or better condition.   in German.   $4.00

106182. Davis, H. W.   Fluorspar and Cryolite in 1920.   United States Geological Survey, 1921, Mineral Resources of the United States, 1920 - Part II, pages 65-80 with illustrations.   Softbound, minor signs of use, good condition.    $5.00

106170. Davis, H. W.   Fluorspar and Cryolite in 1919.   United States Geological Survey, 1921, Mineral Resources of the United States, 1919 - Part II, pages 349-368 with illustrations.   Softbound, minor signs of use, good condition.    $7.00

101625. Ladoo, R.   Fluorspar: Its Mining, Milling, and Utilization, with a Chapter on Cryolite.   United States Department of the Interior, Bureau of Mines, 1927, USBM Bulletin, B 244.   Softbound, xlib, good condition.   Original Publication, Not a Modern Reprint.   $19.00

100207. Pauly, H. and Petersen, O. V.   Red-brown Th-bearing fluorite from the cryolite deposit, Ivigtut, South West Greenland.   Stuttgart, Germany, 1997, Neus Jahrbuch fur Mineralogie - Monatshefte, 1996, Volume 11 : pages 483-490 with 3 figures.   Softbound, self-wrapped, inscribed by the author, very good condition.    $3.00

37258. Science.   Science Magazine : Contains articles on Senescence in Plant Development by Leopold, Cryogenics and Nuclear Physics by Hudson, Ancient Agriculture in the Negev, and much more.   American Association for the Advancement of Science, 1961, Science, 1 December 1961, 134 (3492) : 1715-1774, well illustrated.   Printed wraps, usual signs of use and age, text in good to very good condition.   From the Glenn I. Huss collection.   $5.00

122690. Scientific American.   Scientific American, Cryotron Computer Elements, July 1961.   Scientific American, 1961, Scientific American, Volume 205, Number 1.   Softbound, previous owners stamp, text in very good condition.   Original publication, not a modern reprint.   $8.00