[1] Clark Hubbs. 2005. Personal communication with Clark Hubbs, Professor emeritus, School of Environmental Science, University of Texas, September 7, 2005.
[2] USFWS. 1984. Big Bend gambusia (Gambusia gaigei) Recovery Plan. U.S Fish and Wildlife Service, Albuquerque, NM.
[3] Wauer, R. 1997. For All Seasons, A Big Bend Journal. Austin (University of Texas Press).