Appraisal Institute
  http://www.appraisalinstitute.org

North Texas Chapter Appraisal Institute
  http://www.appraisers.net/ai-northtexas

International Right-of-way Association
  http://www.irwaonline.org/eweb/StartPage.aspx

IRWA Chapter 36
  http://www.irwachapter36.org/