A reference guide to the NTIS bibliographic data file.
Series: NTIS -- PR-253.
Publisher: Dept. of Commerce, National Technical Information Service
Published: 1978
Place of publication: [Springfield, Va.]
Language: eng
Number of pages: 22
Subjects: United States. -- National Technical Information Service -- Catalogs.
Notes: NTIS-PR ; 253.

An NTIS data base reference aid.

May 1978.