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SPAN April 2002 (half of the issue, 5 pages only)
Sample issue of SPAN (866kb)

Kentucky - Big South Fork Arches
National Park Service brochure (144kb)

Natural Bridges in Ohio
Ohio Geology Newsletter lists 40 arches (428kb)
Note: David Church Bridge is now buried

A Bridge Between Cultures:
An Administrative History of Rainbow Bridge National Monument
National Park Service, 2001
231 pages, 16 MB download