There are hundreds of university library catalogues available over the internet, some are available for subject searching. Two catalogues of extraordinary value are the National Library of Medicine (NLM) and the Library of Congress (LC). The NLM is the largest medical library in the world and it’s History of Medicine Division has a subordinate home page providing further resources. “Locator” is a library catalogue, it does not list the contents of serials and periodicals. To find journal articles and other subordinate information other resources are necessary. In medicine the most common computer based system is NLM’s MEDLARS established in 1964. MEDLINE (MEDLARS on line) is now available without charge at the NLM home page and is the most commonly used search tool for medical literature.
For history MEDLINE is limited by its origins — MEDLINE DOES NOT CONTAIN REFERENCES TO LITERATURE PUBLISHED PRIOR TO 1964! A MEDLINE search therefore is a very limited search. There are projects to put older medical literature into online searchable formats but at the present time you must use printed bibliographies to search for literature prior to 1964....