NTIS subject classification
Subtitle: past and present
Series: National Technical Information Service -- PB-270-575; An NTIS data base reference aid
Publisher: NTIS, U.S. Dept. of Commerce
Published: 1977
Place of publication: Springfield, Va
Language: eng
Number of pages: 92
Subjects: Subject headings; Science; Technology
Notes: Cover title.

NTIS/SR-77/04.