1972 census of manufactures.
Engineering, measuring, and controlling and optical instruments.
Washington, D.C. : U.S. Dept. of Commerce, Social and Economic Statistics Administration, Bureau of the Census, 1975.
Manufactures / United States /
Optical industry > Optical industry / United States > Optical industry / United States / Statistics.
Instrument industry > Instrument industry / United States > Instrument industry / United States / Statistics.
Scientific apparatus and instruments > Scientific apparatus and instruments / Statistics.
"SIC industry group 381, 382, and 383"--Cover.
"Issued April 1975."
54 unnumbered pages in various pagings ;
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