1. Miyamoto S, Fenn LB, Swietlik D (1995) TR-169, flow, salts, and trace elements in the Rio Grande: a review—a joint publication of Texas water resources institute (TWRI) and the Texas experimental station (TAES), pp 1–30. http://twri.tamu.edu/reports/1995/169
2. Kimble NE, Ingersoll CG, Kunz JL (2002) Evaluation of toxicity of sediment samples collected from the Santa Ana National Wildlife Refuge, Texas—United States survey final report for the United States Fish and Wildlife Service, project codes 200120003, 2N43
3. Eaton DJ, Anderson JM (1987) The State of the Rio Grande/Rio Bravo. The University of Arizona Press, Tucson, p 331
4. Texas Natural Resources Conservation Commission (TNRCC) (1994) Bi national study regarding the presence of toxic substances in the Rio Grande/Rio Bravo and its tributaries along the boundary portion between the United States and Mexico, Dallas–US (Printing), p 250
5. Texas Natural Resources Conservation Commission (TNRCC) (1998) Second phase of the bi national study regarding the presence of toxic substances in the Rio Grande/Rio Bravo and its tributaries along the boundary portion between the United States and Mexico, vols 1 and 2