Used to Develop the Pictograph Cave Electronic Field Trip:
Duft, Joseph F. and Moseley, Robert K., Alpine Wildflowers of the Rocky Mountains. Missoula, MT: Montana Press Publishing Comp.,1989.
Hart, Jeff. Montana-Native Plants and Early People. Helena, MT: Montana Historical Society, 1976.
Microsoft(R) Encarta(R) 98 Encyclopedia. (c) 1993-1997 Microsoft Corporation .
Montana Fish Wildlife and Parks, Pictograph Cave State Park Trail Guide, 1997.
Mulloy, W.T., Pictograph and Ghost Caves; Home of Prehistoric Indians of This Region.
Rydberg,Per Axel, PH.D. Flora of the Prairies and Plains of Central North America (in two volumes). New York: Dover Publications, Inc.,1971.
Strickler, Dee. Prairie Wildflowers. Columbia Falls, MT: The Flower Press, 1986.
The World Book Encyclopedia, copyright 1989, World Book, Inc.