00977cam a2200301 4500 529304 529304 3669776 NUST 20190924105136.0 730123s1971 dcua b 000 0 eng 77173640 0309019087 MSOHAIL DLC DLC DLC HE5613 .N37 388.312 MOT National Research Council (U.S.). Highway Research Board. 20721 Motorist aid systems. [Washington] 1971. 28 p. illus. 28 cm. $2.40 Synthesis of highway practice ; 7 21151 "Research sponsored by the American Association of State Highway Officials in cooperation with the Federal Highway Administration." Bibliography: p. 26-27. Transportation, Automotive. 21152 Traffic safety. 19675 7 cbc orignew 4 ncip 19 y-gencatlg ddc BK 0 0 ddc 0 0 NIT NIT 2019-09-24 0 388.312 MOT NIT-10819 2019-09-24 2019-09-24 BK