International Conference on Alcohol, Drugs, and Traffic Safety (9th : 1983 : San Juan, P.R.)
[Washington, D.C.?] : U.S. Dept. of Transportation, National Highway Traffic Safety Administration, 1985.
1985
U.S. Department of Transportation's Traffic Safety Summit II (1991 : Orlando, Fla.)
[Washington, D.C.? : U.S. Dept. of Transportation, National Highway Traffic Safety Administration, 1994]
1994