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The US National Library of Medicine in the 21st century: expanding collections,nontraditional formats,new audiences |
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| Authors: | Lacroix Eve-Marie Mehnert Robert |
| Institution: | National Library of Medicine, Bethesda, MD 20894, USA. Lacroix@nlm.nih.gov |
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| 本文献已被 PubMed 等数据库收录！ | |