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Concrete masonry units.

APA Citation

United States. National Bureau of Standards. (1948). Concrete masonry units. Washington, D.C.: U.S. Dept. of Commerce, National Bureau of Standards.

United States. National Bureau of Standards. Concrete Masonry Units. Washington, D.C.: U.S. Dept. of Commerce, National Bureau of Standards, 1948.

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