Não informado. (1938). Building materials and structures report. U.S. Department of Commerce, National Bureau of Standards.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Building Materials and Structures Report. Washington: U.S. Department of Commerce, National Bureau of Standards, 1938.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Building Materials and Structures Report. U.S. Department of Commerce, National Bureau of Standards, 1938.
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