Historic Preservation: Pipestone National Monument - The Minnesota Historical Society presents an 1881 pen-and-ink drawing of what later became the first national monument in the United States. www.mnhs.org/preserve/shpo/pipestone.html
Pipestone National Monument - Part of the Great Plains Prairie Cluster Ecological Monitoring Program. Inventory of plant and animal species, maps, meteorological data, bibliography. web.missouri.edu/~aggwills/pipe
The Pipestone Petroglyphs - Article on an anthropological mystery, by Thomas D. Thiessen. Petroglyphs near the Three Maidens were removed in the late nineteenth century, perhaps in a misguided attempt at historic preservation. www.tcinternet.net/users/cbailey/PipeTom.html
Pipestone National Monument - Official National Park Service site. Brief history, hours, maps, information on facilities. www.nps.gov/pipe
