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- [7] OUTLOOK FOR OIL-FIELD CHEMICALS UNTIL THE YEAR 1994 ERDOL & KOHLE ERDGAS PETROCHEMIE, 1991, 44 (04): : 158 - 158
- [9] TECHNOLOGY, ECONOMICS DEFINE TRENDS IN OIL-FIELD CHEMICALS JOURNAL OF PETROLEUM TECHNOLOGY, 1986, 38 (12): : 1199 - 1200