Não informado. (1952). Bulletin of Mechanical Engineering Education. Wynn Williams Publishers.
Chicago-referens (17:e uppl.)Não informado. Bulletin of Mechanical Engineering Education. Wreyham, Inglaterra: Wynn Williams Publishers, 1952.
MLA-referens (8:e uppl.)Não informado. Bulletin of Mechanical Engineering Education. Wynn Williams Publishers, 1952.
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