共 5 条
[1]
Evans H.K., 1950, TRAFFIC ENG HDB
[2]
MATSON TM, 1955, TRAFFIC ENG, P326
[3]
1956, UNIFORM VEHICLE CODE, P100
[4]
1948, MANUAL UNIFORM TRAFF, P107
[5]
1954, MANUAL UNIFORM TRAFF, P6