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- [2] CRUDE-OIL DEPOSITS IN MOLASSE REGION ERDOL & KOHLE ERDGAS PETROCHEMIE, 1978, 31 (09): : 393 - 394
- [4] PROPERTIES AND COMPOSITION OF CRUDE-OIL IN WEST SIBERIA OIL DEPOSITS NEFTYANOE KHOZYAISTVO, 1989, (07): : 48 - 50
- [8] THE COST FUNCTION FOR CRUDE-OIL PRODUCTION MANCHESTER SCHOOL OF ECONOMIC AND SOCIAL STUDIES, 1961, 29 (03): : 249 - 265