Moench, Robert H. Geology of Precambrian rocks, Idaho springs district, Colorado / by Robert H. Moench. -- Washington : United States Government Printing Office, 1964 - 70 p. + map. -- (Geological Survey Bulletin ; 1182-A). Subjects--Topical Terms: ColoradoEstratigrafíaPrecámbrico Universal Decimal Class. No.: 551.71/.72(788)