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The NLM Classification is updated annually and users of this information are encouraged to obtain the most current data. The new versions are generally available by April of the edition year.
The data are available to all requesters, both within and outside the United States. There is no charge for obtaining the data.
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Download the following three (3) sections:
- Section 1: Introductory Material [PDF; 14 KB]
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- Section 3: Index [PDF; 2 MB]
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Last updated: 19 May 2009
First published: 08 October 2002
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