Traffic patrol for traffic law enforcement.
Contributors: Northwestern University (Evanston, Ill.). Traffic Institute.
Series: Traffic patrol series; Traffic patrol series
Publisher: Traffic Institute, Northwestern University
Published: 1971
Place of publication: [Evanston, Ill.]
Language: eng
Subjects: Traffic police -- United States.
Notes: Cover title.

"P.N. 2150"--Cover.

Bibliography: p. 8.