Zoology–Colorado River Watershed (Colorado–Mexico), Animal ecology–Colorado River Watershed (Colorado–Mexico)
Hayward, C. Lynn; Beck, D Elden; and Tanner, Wilmer W.
"Zoology of the Upper Colorado River Basin: 1. The biotic communities,"
Brigham Young University Science Bulletin, Biological Series: Vol. 1
, Article 1.
Available at: http://scholarsarchive.byu.edu/byuscib/vol1/iss3/1