R & D highway & safety transportation system studies.
Highway transportation research and development studies
Washington, D.C. : U.S. G.P.O., 1970-1971.
Traffic / Safety /
Traffic / Safety / United States /
Traffic / Safety / United States / Research /
Highway research > Highway research / United States > Highway research / United States / Periodicals.
Vol. for 1969/70: issued in cooperation with the National Highway Safety Bureau; 1970/71 with the National Highway Traffic Safety Administration.
2 v. :
20 x 26 cm.
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