America History and Life: How to limit the search to a specific historical period
The databases America: History and Life
(for US history) or Historical Abstracts
(for world history) have an option to limit search by historical period:
Under advanced search - search options, there is a "Historical Period" option that allows you to enter a year to another year.
Disclaimer: this tool may not completely eliminate results outside of your period, but it will eliminate some irrelevant ones.
Search Tutorials | Find more about searching by period / databases /