@book{ 0-1187519758, title = {CRIB - the mineral resources data bank of U.S. Geological Survey}, series = {Geological Survey circular}, author = {Calkins, James Alfred and Kays, Olaf and Keefer, Eleanor K.}, address = {Washington}, publisher = {U. S. Department of the Interior}, year = {1973}, language = {English}, url = {https://katalog.ub.tu-freiberg.de/Record/0-1187519758} }