Austin MUFON has a great beginning of an archive, with over 100 magazines (many of rare materials from the 1950s, 60s, & 70s) as well as a great collection of early Contactee literature, Modern Abduction studies, and Much More.

Plans are forming for the preservation and expansion of these materials as well as access to them for the serious researcher. Stay Tuned for Details.

In the meantime why don't you browse the currently private collection of SMiles Lewis' Anomaly Archives. There are now well over 600 books and hundreds of magazines. An updated database will be posted in the near future.