Contains records (citations only, no fulll text) from the USDA's National Agriculture Library dating back to 1970. 

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MEDLINE is a bibliographic database of life sciences and biomedical information, produced by the National Library of Medicine (NLM, United States). It contains millions of references to journal articles in life sciences with a concentration on biomedicine. It indexes literature published from 1966 to the present.

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Web of Science (WoS) indexes leading scholarly journals, books, proceedings, and other formats. Its major subject areas include the natural and social sciences and arts and humanities with coverage back to 1900. The heart of WoS is the Web of Science Core Collection, which indexes thousands of scholarly journals by author, author affiliation, and cited reference. In addition to the Core Collection, Web of Science provides access to several regional, subject, and format-specific database.

The suite of video tutorials teach aspects of searching, analyzing results, creating a researcher profile, and more. EndNote Web, the bibliographic management tool, is integrated into WoS.

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BioOne is a database of high quality, subscribed and open-access titles focused in the biological, ecological, and environmental sciences. As a nonprofit organization, BioOne exists for the benefit of the scientific community. 

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SciFinder is the interface to the database of chemistry literature, Chemical Abstracts. It provides full-text access to the world's most comprehensive and authoritative source of substances and reactions in chemistry and related sciences. In addition to the reference, substance, reaction and supplier content found in CAS SciFinder®, CAS SciFinder-n includes relevance-ranked results, step-by-step procedures and protocols, citation mapping, biosequence searching, retrosynthetic analysis, patent landscape mapping, touch-screen enabled structure drawing and much more—all accessible in a simple, easy-to-use interface.

You must be a Calvin student in order to use this database, and you will need to request registration from this page before using the site for the first time.

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NCBI (National Center for Biotechnology Information) is a cross-database search engine for multiple life science databases. Some of the subjects covered include: gene sequences, molecular structure, proteins, and nucleotides.

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The Aquatic and Invasive Plant Information Retrieval System (APIRS) includes annotated citations to peer-reviewed and gray literature and reports, with aquatic, wetland and natural area invasive plants as the focus.

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Science Direct is the search engine for journals published by Elsevier, the world's largest publisher of peer-reviewed science, technical, and medical journals.

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