According to the Library of Congress
"Primary Sources are the raw materials of history, original documents and objects which were created at the time."
"Secondary sources are accounts or interpretations of events created by someone without firsthand experience."
"Tertiary source present summaries or condensed versions of materials, usually with references back to the primary and/or secondary sources."
1. Begin by looking at the resources listed in the bibliographies found in the tertiary sources you are using. The resources in these bibliographies are Secondary Sources.
3. Stop by the Research Desk and ask a Librarian.
The Oxford Biblical Studies Online is a comprehensive resource for the study of the Bible and biblical history of nineteen reference works published by Oxford University Press.
The best database to use for peer-reviewed journal articles in biblical studies is ATLA Religion Database with ATLASerials