Sorraia Information Site - Information about the Sorraia mustang and its studbook, including breed magazine. www.sorraia.org
Southwest Spanish Mustang Association - A nonprofit organization dedicated to the preservation of the horses which populated the United States in early colonial times. www.geocities.com/Heartland/Prairie/8195
Spanish Mustang Registry Home Page - Learn about the rich heritage, unique colors and markings of this fine breed. www.spanishmustang.org
Sulphur Horse Registry - Information on the Sulphur Springs Mustangs including history, photographs, research study, registration forms, and horses for sale. www.sulphurs.com
The Kiger Mesteño Association - Registry founded in 1988 to protect and preserve wild Kiger mustangs and Kiger mustangs in captivity. www.kigermustangs.org
