Fluorine in a closed drainage basin, Saguache and Alamosa Counties, Colorado : fluorine content of samples from the vast quantities of lacustrine clay in the San Luis Valley ranged from 170 to 970 ppm /
Van Alstine, Ralph Erskine,1914-
Simon, Frederick Otto,1939-
Geological Survey (U.S.)
Washington : U.S. G.P.O.,
1982.
One map on folded leaves in pocket.
Includes bibliographical references (p. 7).
Fluorine.
Geochemistry
Geochemistry