Member: Texas International Law Journal, 1973-1974; Board of Advocates, University of Texas, 1973-1974. Author: "Drafting and Enforcing the Deed of Trust Covering Oil and Gas Interests," 6th Annual Advanced Oil, Gas and Mineral Law Course, 1988 (State Bar of Texas); "Current Developments in Energy Financing: Alternatives to Traditional Production—Secured Borrowing," Oil and Gas Law 1994 (Oklahoma City University School of Law); "Issues in Trade and Vendor Financing: You Scratch My Back and I'll Scratch Yours," 14th Annual Advanced Oil, Gas and Mineral Law Course, 1996 (State Bar of Texas). Past Chairman, Oil, Gas and Mineral Law Section, State Bar of Texas. (Board Certified, Oil, Gas and Mineral Law, Texas Board of Legal Specialization)