World petroleum congress : proceedings, 8th, Moscow, 1971
World petroleum congress : proceedings, 8th, Moscow, 1971 - - London Applied Science Pub., 1971 - v.2 30 cm - .
0-85334-517-10
Petroleum-Geology-Congresses
Petroleum-Prospecting-Congresses
Petroleum-Congresses
665.5 Wor:8:71-2