TY - BOOK TI - USGS research on mineral resources, 1994 T3 - US Geological Survey circular CY - Washington, DC PB - United States Gov. Print. Office PY - 1994 PY - 1994 LA - English KW - Konferenzschrift KW - 1993 KW - Tucson, Ariz. KW - Mineralischer Rohstoff KW - Ressourcen KW - (DE-627) KW - Energievorrat KW - (DE-627) UR - https://katalog.ub.tu-freiberg.de/Record/0-1111633657 ER -