(Cameron Station, Alexandria, Va.) [Updates Thesaurus of ASTIA descriptors, 2d edition, Dec. 1962, and supersedes DDO supplement to thesaurus of ASTIA descriptors, 2d edition, DDC authorized descriptors, July 1964, and Descriptor hierarchies, July 1964.]
Notes:
(Cameron Station, Alexandria, Va.) [Updates Thesaurus of ASTIA descriptors, 2d edition, Dec. 1962, and supersedes DDO supplement to thesaurus of ASTIA descriptors, 2d edition, DDC authorized descriptors, July 1964, and Descriptor hierarchies, July 1964.] ‡ Official Use. Not Available. • Sent to Depository Libraries. Item 314-E
Availability:
‡ Official Use. Not Available. • Sent to Depository Libraries. Item 314-E