Secondary source, noun
Any published or unpublished work that is one step removed from the original source, usually describing, summarizing, analyzing, evaluating, derived from, or based on primary source materials...—definition from the Online Dictionary for Library and Information Science
Looking for journal articles topics related to the U.S. welfare state? Try these resources:
To find only ebooks:
1. Search the library catalog (https://library.wlu.edu) on the library's main webpage with “books only” selected.
2. On the left of the results screen, under “Refine my results,” click “Available online” & “Apply filters.”