Becraft, George E. 1922-
Uranium in Carbonaceous rocks in the townsend and Helena Valleys Montana / by George E. Becraft. -- Washington : United States Government Printing Office, 1958 - P. 149-164 + map. -- (Geological Survey Bulletin ; 1046-G).
Montana
Yacimientos de Uranio
553.495(786)
Uranium in Carbonaceous rocks in the townsend and Helena Valleys Montana / by George E. Becraft. -- Washington : United States Government Printing Office, 1958 - P. 149-164 + map. -- (Geological Survey Bulletin ; 1046-G).
Montana
Yacimientos de Uranio
553.495(786)