Geology and uranium deposits of the Caribou area, Boulder County Colorado : contributions to the geology of uranium /

Autor Moore, Frank Baker B., Cavender, S. W., Kaiser, E. P. 1912-2001
Vydáno 1957

Niobium (columbium) and titanium at Magnet Cove and Potash Sulphur Springe, Arkansas : a contribution to economic geology /

Autor Fryklund, V. C. Jr., 1920-2014, Harner, R. S., Kaiser, E. P. 1912-2001
Vydáno 1954