Microfilm readers : category, hardware standard; subcategory, computer output microfilm readers

Chicago citation style
United States. National Bureau of Standards. Microfilm readers : category, hardware standard; subcategory, computer output microfilm readers. 1980. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/011394545. (Accessed December 15, 2018.)
APA citation style
United States. National Bureau of Standards, (1980) Microfilm readers : category, hardware standard; subcategory, computer output microfilm readers. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/011394545
MLA citation style
United States. National Bureau of Standards. Retrieved from the Digital Public Library of America <http://catalog.hathitrust.org/Record/011394545>.
Note: These citations are programmatically generated and may be incomplete.