Minerals for atomic energy; a guide to exploration for uranium, thorium, and beryllium. Nininger, Robert D. Uranium ores. Thorium. Beryllium. Prospecting. TN490.U7 N5 553.493 NIM Includes bibiographies. New York : Van Nostrand, 1954. 1954. 1954 Text xii, 367 p. : eng