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Ship radiotelegraph safety rules, May 21, 1937.

APA Citation

United States. Federal Communications Commission. (1937). Ship radiotelegraph safety rules, May 21, 1937. [Washington]: [U. S. Govt. print. off.].

United States. Federal Communications Commission. Ship Radiotelegraph Safety Rules, May 21, 1937. [Washington]: [U. S. Govt. print. off.], 1937.

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