Não informado. (1946). McGraw Hill digest: Engineering, industry, science, business. McGraw-Hill Publications.
Citace podle Chicago (17th ed.)Não informado. McGraw Hill Digest: Engineering, Industry, Science, Business. New York: McGraw-Hill Publications, 1946.
Citace podle MLA (8th ed.)Não informado. McGraw Hill Digest: Engineering, Industry, Science, Business. McGraw-Hill Publications, 1946.
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