PubMed - Free access to bibliographic information from MEDLINE, OLDMEDLINE, other non-indexed citations, and NCBI Books.
MEDLINE on Ovid (1946 -) - The full range of biomedical sciences, with clinical medicine at the core. Preferred interface for MEDLINE when building a systematic review search. See other MEDLINE database segments on OvidSP.
McGill LibGuides - List of all subjet guides developed by McGill librarians and organized into broad disciplines, e.g., humanities & social sciences, health & biological sciences, physical sciences & engineering