Index Medicus/MEDLINE/PubMed published by U.S. Nationa l Library of Medicine (NLM) is the most important and commonly used biomedical l iterature retrieval system in the world.

Index Medicus/MEDLINE/PubMed published by U.S. Nationa l Library of Medicine (NLM) is the most important and commonly used biomedical l iterature retrieval system in the world.

美国国立医学图书馆出版的IndexMedicus/MEDLINE /PubMed(《医学索引》)是当今世界上最常用的权威生物医学文献检索系统。