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Procedure for testing supplied-air respirators for permissibility.

APA Citation

United States. Bureau of Mines. (1937). Procedure for testing supplied-air respirators for permissibility. Washington: U. S. Govt. print. off..

United States. Bureau of Mines. Procedure for Testing Supplied-air Respirators for Permissibility. Washington: U. S. Govt. print. off., 1937.

Warning: These citations may not always be complete (especially for serials).