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- [15] NATURAL-GAS IN SUBSTITUTIONAL COMPETITION ON THE HEATING MARKET ERDOL & KOHLE ERDGAS PETROCHEMIE, 1982, 35 (11): : 535 - 536
- [16] KINETICA NATURAL-GAS LEADING THE INDEPENDENT MARKET GAS ENGINEERING & MANAGEMENT, 1995, 35 : 35 - &
- [17] ALASKAN NATURAL-GAS - WHICH ROUTE TO MARKET PROFESSIONAL GEOGRAPHER, 1978, 30 (02): : 180 - 189
- [18] EAST GERMAN NATURAL-GAS MARKET IN CONFLICT ERDOL & KOHLE ERDGAS PETROCHEMIE, 1991, 44 (02): : 57 - 58
- [19] LIQUID NATURAL-GAS WITH EXPANDING SHARE OF MARKET BRENNSTOFF-WARME-KRAFT, 1977, 29 (11): : 427 - 427