Below are links to databases with various source types, and as some of the databases cover more than one source type, you may see them listed under more than one category.
Primary Sources (from Wikipedia): an artifact, a document, diary, manuscript, autobiography, a recording, or other source of information that was created at the time under study. It serves as an original source of information about the topic; can be a person with direct knowledge of a situation, or a document written by such a person.
Secondary Source (from Wikipedia): a document or recording that relates or discusses information originally presented elsewhere. A secondary source contrasts with a primary source, which is an original source of the information being discussed; involve generalization, analysis, synthesis, interpretation, or evaluation of the original information.
Tertiary (Reference) Source (from Wikipedia): an index or textual consolidation of primary and secondary sources; encyclopedias, textbooks, and compendia attempt to summarize and consolidate the source materials into an overview, but may also present subjective commentary and analysis (which are characteristics of secondary sources).