Character sets for Optical Character Recognition (OCR) : category, hardware standard : subcategory, character recognition

Chicago citation style
Character sets for Optical Character Recognition (OCR) : category, hardware standard : subcategory, character recognition. [1982]. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/011394593. (Accessed December 14, 2018.)
APA citation style
([1982]) Character sets for Optical Character Recognition (OCR) : category, hardware standard : subcategory, character recognition. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/011394593
MLA citation style
Retrieved from the Digital Public Library of America <http://catalog.hathitrust.org/Record/011394593>.
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