1. Ahler, Stanley A. 1971.Projectile Point Form and Function at Roger's Shelter, Missouri. Columbia: College of Arts and Science, University of Missouri-Columbia and the Missouri Archeological Society.
2. Agee, James K. 1993.Fire Ecology of Pacific Northwest Forests. Washington, D.C. Island Press.
3. Aguilar, George W. Sr. 2005.When the River Ran Wild!: Indian Traditions on the Mid-Columbia and the Warm Springs Reservation. Portland, Oregon: Oregon Historical Society Press.
4. Alt, David D. and Donald W. Hyndman 1981Roadside Geology of Oregon. Mountain Press Publishing Co., Missoula, Montana.
5. Alt, David D. and Donald W. Hyndman 1984.Roadside Geology of Washington. Mountain Press Publishing Co., Missoula, Montana.