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National Library of Medicine Technical BulletinNational Library of Medicine Technical Bulletin

Letter Z

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Access to MEDLINE and MEDLINE Backfiles. 1995 Sep-Oct:23


AZT, a new entry version. 1990 Sep-Oct:5

Clinical Alert. 1994 Mar-Apr:3

ZIP CODE, NLM. 1979 Mar:3

Zip Codes.

changed for NLM and NIH. 1985 Aug:3

SDILINE availability for U.S. 1985 Apr:3

ZN (Mesh Z Tree Number for Country of Publication)

Changes for 1991. 1991 Sep-Oct:Appendix D

Year-End Processing1991 Sep-Oct:11

ZN (Country of Publication) Field Changes. 1992 Nov-Dec:23

ZN (MeSH Z Tree Number) Field Replaced. 1993 Sept-Oct:13,18

NLM Technical Bulletin National Library of Medicine National Institutes of Health