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University of Dayton: International Marian Research Institute
This is a huge resource base for any research on Mary, the Mother of Jesus. Search the site for answers to specific questions about Mary that you have.
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Mary: The Mother of My Lord
Written from a Catholic point of view, this site contains an article on Mary. Uses quotes, prayers, and a short biography to help us understand her better and why Catholics venerate her.
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Ud: Biblical References to Mary, Mother of Jesus
A very helpful site that includes links to specific Bible passages with Mary in them. Click on the specific site and you can read the article.