Web of Science covers journals in Science, Engineering, Agriculture and Medicine. Web of Sciences allows users to see how often an article was cited and view those citations, view the citations the author used, and search by citation. The Web of Science Core Collection covers 1980-present. To review scientific literature published before 1980 open up your search to "All Databases" instead of just "Web of Science Core Collection." This will incorporate earlier material from BIOSIS, Zoological Record, and MEDLINE.