United States Fish and Wildlife Service. "Overview". Balcones Canyonlands National Wildlife Refuge. Archived from the original on May 11, 2009. Retrieved March 21, 2010.
United States Fish and Wildlife Service. "Welcome". Balcones Canyonlands National Wildlife Refuge. Archived from the original on March 8, 2010. Retrieved March 20, 2010.
"Impacts". Archived from the original on July 16, 2012. Retrieved August 2, 2012. "Now Open – National American University" Community Impact Newspaper, Retrieved August 2, 2012
Jordan, Terry G. "Hill Country". Handbook of Texas Online. Archived from the original on November 2, 2010. Retrieved November 7, 2009.
United States Fish and Wildlife Service. "Overview". Balcones Canyonlands National Wildlife Refuge. Archived from the original on May 11, 2009. Retrieved March 21, 2010.
United States Fish and Wildlife Service. "Welcome". Balcones Canyonlands National Wildlife Refuge. Archived from the original on March 8, 2010. Retrieved March 20, 2010.
"Impacts". Archived from the original on July 16, 2012. Retrieved August 2, 2012. "Now Open – National American University" Community Impact Newspaper, Retrieved August 2, 2012