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1
Washington, D.C. : Highway Research Board, 1970

Book
2
Washington, D.C. : Highway Research Board, 1967

Conference Proceeding Book
3
Washington, 1968

Book
4
Washington, D.C. : Highway Research Board, 1970

Book
5
Washington, D.C. : Highway Research Board, 1971

Book
6
Washington, D.C. : Transportation Research Board, 1974

Book