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National Library of Medicine Technical BulletinNational Library of Medicine Technical Bulletin

Table of Contents: 2021 SEPTEMBER–OCTOBER No. 442

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SemNav to be Discontinued

SemNav to be Discontinued. NLM Tech Bull. 2021 Sept-Oct;(442):e4.

2021 September 29 [posted]

SemNav will cease operation on December 31, 2021. The UMLS may still be browsed at

NLM Technical Bulletin National Library of Medicine National Institutes of Health