Não informado. (1925). Technical news bulletin of the National Bureau of Standards. U.S. Department of Commerce, National Bureau of Standards.
Citação do estilo Chicago (17ª ed.)Não informado. Technical News Bulletin of the National Bureau of Standards. Washington: U.S. Department of Commerce, National Bureau of Standards, 1925.
Citação MLA (8ª ed.)Não informado. Technical News Bulletin of the National Bureau of Standards. U.S. Department of Commerce, National Bureau of Standards, 1925.
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