Acknowledgments
Financial support from the Cooperative Park Studies Unit, U.S. Geological Survey, United States Department of the Interior, to the School of Renewable Natural Resources, University of Arizona, enabled the effort to compile this bibliography to begin. This work culminated in the publication of a preliminary bibliography of literature pertaining to the Madrean Biogeographic Province (Ffolliott et al. 1994). William Halvorson, Unit Leader, and Peter Bennett are thanked for their assistance in initiating this effort. Subsequent funding was provided by the Rocky Mountain Forest and Range Experiment Station, USDA Forest Service, through the Borderlands Ecosystem Management Program, and the School of Renewable Natural Resources, University of Arizona, to complete the bibliography.

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