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The properties and testing of optical instruments.

APA Citation

United States. National Bureau of Standards. (1918). The properties and testing of optical instruments. 2d ed. Washington: Govt. Print. Off..

MLA Citation

United States. National Bureau of Standards. The Properties And Testing of Optical Instruments. 2d ed. Washington: Govt. Print. Off., 1918.

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