Document mark (blip) used in image mark retrieval systems.
Publisher: National Micrographics Association
Published: 1979
Place of publication: [Silver Spring, Md.]
Language: eng
Subjects: Documents on microfilm -- Standards -- United States.; Information storage and retrieval systems -- Standards -- United States.
Notes: Cover title.
"ANSI/NMA MS8-1979 (revision of ANSI PH5.20-1974; NMA MS8-1974)."
"Approved September 13, 1979, as an American National Standard."