Gehlen, K. von
The environmental impacts of exploitation of oil shales and tar sands / K.Von Gehlen - Nairobi: United Naions Environment Programme, 1985 - 148p.: ill. - Energy report series; ERS-13-85 .
At head of title: Institute of Geochemistry, Petrology and Economic Geology, University of Frankfurt am Main
Oil-shale industry--Environmental aspects
Oil sands--Environmental aspects
The environmental impacts of exploitation of oil shales and tar sands / K.Von Gehlen - Nairobi: United Naions Environment Programme, 1985 - 148p.: ill. - Energy report series; ERS-13-85 .
At head of title: Institute of Geochemistry, Petrology and Economic Geology, University of Frankfurt am Main
Oil-shale industry--Environmental aspects
Oil sands--Environmental aspects