Answered By: Bo Adams
Last Updated: May 20, 2016     Views: 11

Relatively little, as there is an agreement between the developers of these two indexes to minimize overlap in order to offer a greater breadth of indexed titles.  You can compare coverage lists by looking at current coverage for the ATLA Religion Database and the Catholic Periodical Literature Index on this page.  If you are researching a topic for which reference to Catholic periodicals would be helpful, it is best to search both databases for a more comprehensive search.

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