TY - BOOK AU - Sidney,Katell AU - Wellman,Paul AU - Wellman,Paul ED - United States of America. Department of the Interior TI - Mining and conversion of oil shale in a gas combustion retort T2 - Bureau of Mines Oil Shale Program. Technical Progress Report U1 - Archivo B952 0001775 PY - 1971/// CY - United States of America PB - Bureau of Mines KW - Esquistos bituminosos ER -