Hay, N. E. (1985). Guide to new natural gas utilization technologies. Fairmont Press.
Chicago-čujuhus (17. p.)Hay, Nelson E. Guide to New Natural Gas Utilization Technologies. Atlanta, GA: Fairmont Press, 1985.
MLA-čujuhus (9. p.)Hay, Nelson E. Guide to New Natural Gas Utilization Technologies. Fairmont Press, 1985.
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