Kohl, A. L., & Nielsen, R. (1997). Gas purification (5th ed.). Gulf Pub..
Chicago-čujuhus (17. p.)Kohl, Arthur L., juo Richard Nielsen. Gas Purification. 5th ed. Houston, Tex.: Gulf Pub., 1997.
MLA-čujuhus (9. p.)Kohl, Arthur L., juo Richard Nielsen. Gas Purification. 5th ed. Gulf Pub., 1997.
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