IPA.Petroleum Industry Management Forum , 1997
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editor, John C. McCaslin
PennWell Publishing , 1990
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Statistics Division, Petroleum Information Service, 1968
Buku Referensi
Adelman, M.A., author
Johns Hopkins University Press, 1972
Buku Teks
editor Jim West
PennWell Pub. Co., 1998
Buku Referensi