Cannon, R. L., Roy T. Hazzard, Addison Young, & Keith P. Young. (Trip leaders) books & textbook
Geology of the Val Verde Basin and Field Trip Guidebook, November 5,6,7,8, 1959.
Cannon, R. L., Roy T. Hazzard, Addison Young, & Keith P. Young. (Trip leaders)
West Texas Geological society /1959T Hardcover
