PubMed comprises over 22 million citations for biomedical literature from MEDLINE, life science journals, and online books. PubMed citations and abstracts include the fields of biomedicine and health, covering portions of the life sciences, behavioral sciences, chemical sciences, and bioengineering.
Contains indexing, citations and links to the full text of most reports, documents, books and series published by the USGS and USGS authors. The reports and thematic maps database currently contains more than 130,000 bibliographic citations, including USGS numbered series begun as early as 1880.
Full-text, fully searchable content from a wide range of primary sources. Includes monographs, newspapers, pamphlets, manuscripts, ephemera, maps, statistics and more. Archives published in the program include works in Western as well as non-Western languages and are sourced from rare collections at libraries and other venerable institutions from around the globe. Each individual archive within Nineteenth Century Collections Online presents the raw materials scholars require for their research needs.
All material cataloged by OCLC member libraries including: books, manuscripts, websites & internet resources, maps, computer programs, musical scores, films & slides, newspapers, journals, magazines, sound recordings, articles, chapters, papers, videotapes. Over 179 million records representing materials from 1000 BCE to the present, many with online links to the fulltext. Updated daily.