00547nam a22001811 4500 1/15141 990316s GRE d 0333306678 15634 GR-PeUP 338.272 8 SE Seymour, Ian. OPEC Instrument of change/ Ian Seymour London: MacMillan, 1980 ix, 306 p.; 25 cm. Petroleum products Prices. Petroleum industry and trade. INST UNIPILB MAIN 20040709 338.272 8 SE 00131899 00131899 LOAN 0 1