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PubMed is a free database including primarily the MEDLINE database of references and abstracts on life sciences and biomedical topics. The United States National Library of Medicine (NLM) at the National Institutes of Health maintains the database as part of the Entrez system of information retrieval.
PubMed Central is a free digital archive of full articles, accessible to anyone from anywhere via a web browser (with varying provisions for reuse). Conversely, although PubMed is a searchable database of biomedical citations and abstracts, the full-text article resides elsewhere (in print or online, free or behind a subscriber paywall).
Index and metadata for all scholarly output. Free OurResearch: PsycINFO: Psychology: 3,700,000 Focus at behavioral science and mental health. Coverage 1887–present. Subscription APA: PubMed [47] Biomedical, life sciences: 30,000,000 A database primarily of references and abstracts on life sciences and biomedical topics.
MeSH was introduced in the 1960s, with the NLM's own index catalogue and the subject headings of the Quarterly Cumulative Index Medicus (1940 edition) as precursors. The yearly printed version of MeSH was discontinued in 2007; MeSH is now available only online. [2] It can be browsed and downloaded free of charge through PubMed.
The Abridged Index Medicus provides a list of 114 selected "core clinical journals" (this subset of the medical literature can be searched in PubMed using a 'journal categories' filter) Another useful grouping of core medical journals is the 2003 Brandon/Hill list, which includes 141 publications selected for a small medical library.
Index Medicus (IM) is a curated subset of MEDLINE, which is a bibliographic database of life science and biomedical science information, principally scientific journal articles. From 1879 to 2004, Index Medicus was a comprehensive bibliographic index of such articles in the form of a print index or (in later years) its onscreen equivalent.
A citation index is a kind of bibliographic index, an index of citations between publications, allowing the user to easily establish which later documents cite which earlier documents. A form of citation index is first found in 12th-century Hebrew religious literature.
The Abridged Index Medicus provides a list of 114 selected "core clinical journals". [18] Another useful grouping of core medical journals is the 2003 Brandon/Hill list, which includes 141 publications selected for a small medical library [19] (although this list is no longer maintained, the listed journals are of high quality).