Swanson, Vernon Emmanuel 1922-1992 Geology and geochemistry of Uranium in Marine black shales a Review / by Vernon E. Swanson. -- Washington : United States Government Printing Office, 1961 - P. 67-112. -- (Geological Survey Professional Paper ; 356-C). Subjects--Topical Terms: Geoquímica Universal Decimal Class. No.: 550.4