Texas Department of Public Safety v. Preston , 1987 Tex. App. LEXIS 6537 ( 1987 )
Texas Department of Public Safety v. Schaejbe , 28 Tex. Sup. Ct. J. 342 ( 1985 )
Texas Dept. of Public Safety v. Sefcik , 1988 Tex. App. LEXIS 1487 ( 1988 )