1. C. Arden Pope, III, PhD, Richard T. Burnett, PhD, Michael J. Thun, MD, Eugenia E. Calle, PhD, Daniel Krewski, PhD, Kazuhiko Ito, PhD, and George D. Thurston, ScD. “Lung cancer, cardiopulmonary mortality, and long-term exposure to fine particulate air pollution.” Journals of the American Medical Association 2002;287(9):1132-1141. Web. 27 Jan. 2018.
  2. C. Arden Pope, Richard T. Burnett, George D. Thurston, Michael J. Thun, Eugenia E. Calle, Daniel Krewski, John J. Godleski. “Cardiovascular mortality and long-term exposure to particulate air pollution: epidemiological evidence of general pathophysiological pathways of disease.” Circulation 2004;109:71-77. Web. 27 Jan. 2018.
  3. C. Arden Pope, Richard T. Burnett, George D. Thurston, Michael J. Thun, Eugenia E. Calle, Daniel Krewski, John J. Godleski. “Cardiovascular mortality and long-term exposure to particulate air pollution: epidemiological evidence of general pathophysiological pathways of disease.” Circulation 2004;109:71-77. Web. 27 Jan. 2018.
  4. Beate Ritz, Michelle Wilhelm. “Ambient air pollution and adverse birth outcomes: methodologic issues in an emerging field.” Basic Clin Pharmacol Toxicol 2008 Feb; 102(2): 182-190. Web. 27 Jan. 2018.
  5. Erickek, George A. “An assessment of the economic impact of the proposed Stoneco gravel mine operation on Richland Township.” Report prepared for the Richland Township Planning Commission (2006): 4-7. Web. 27 Jan. 2018.
  6. Smith, Gary, PhD. “Economic costs and benefits of the proposed Austin Quarry in Madera County” (2014): 6-9. Web. 12 Feb. 2018.
  7. Texas Commission on Environmental Quality Investigation Report 1151378, Disclosure of Violations by Vulcan Construction Materials, LP (2014)
  8. David Barer, Robert Maxwell, Josh Hinkle. “Investigation: For environmental violators, state often cuts deals” KXAN-TV. Nexstar Broadcasting, Inc. 9 Aug. 2016. Web. 14 Feb. 2018.
  9. Neena Satija, Jim Malewitz. “Fired TCEQ investigator: law firm triggered dismissal” The Texas Tribune. 22 Jan. 2015. Web. 14 Feb. 2018.
  10. Bexar County Appraisal District. Web. 14 Feb. 2018.
  11. Comal County Appraisal District. Web. 26 Oct. 2017.
  12. Texas Administrative Code, Title 30, Section 55 (Subchapter F: Requests for Reconsideration or Contested Case Hearing). Web. 14 Jun. 2018.
  13. Texas Commission on Environmental Quality. Web. 14 Jun. 2018.