Searches across 39 molecular and literature database maintained by NCBI (the National Center for Biotechnology Information). Results are listed by database so a single search can lead to discover of different types of data. Good for a broad overview.
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Online Index-Catalogue of the Library of the Surgeon-General's Office, an index of medical and scientific publications from 1880-1961; eTK, covering medieval Latin; eVK2, covering medieval English texts; and other selected historical resources.
Archive of California's legislative information for dates 1993 to the present. Files available by using the Downloadable Database.
Oral histories gathered by the U.S. National Library of Medicine.