1. Anning, D.W., Duet, N.R., 1994. Summary of ground-water conditions in Arizona, 1987–1990, US Geological Survey Open-file Report 94-476, 2 sheets.
2. Betancourt, J.B., 1990. Tucson's Santa Cruz River and the arroyo legacy. PhD dissertation, Tucson, University of Arizona, 232 p.
3. Algal and invertebrate biota in the Colorado river: comparison of pre- and post-dam conditions;Blinn,1991
4. Scientific Basis of Water-Resource Management;Bredehoeft,1982
5. Historical vegetation change in the Owens River riparian woodland;Brothers,1981