Berwald, W. B., & Johnson, T. W. (1931). Factors influencing flow of natural gas through high-pressure transmission lines. [publisher not identified].
Chicago Style (17th ed.) CitationBerwald, William Bennett, and T. W. Johnson. Factors Influencing Flow of Natural Gas Through High-pressure Transmission Lines. Washington, D.C.: [publisher not identified], 1931.
MLA (9th ed.) CitationBerwald, William Bennett, and T. W. Johnson. Factors Influencing Flow of Natural Gas Through High-pressure Transmission Lines. [publisher not identified], 1931.
Warning: These citations may not always be 100% accurate.