Road user characteristics 7 reports.

Manylion Llyfryddiaeth
Awduron Corfforaethol:	National Research Council (U.S.). Highway Research Board. Committee on Vehicle Characteristics, National Research Council (U.S.). Highway Research Board. Committee on Road User Characteristics
Fformat:	Llyfr
Iaith:	English
Cyhoeddwyd:	Washington, D.C. Highway Research Board, National Research Council 1967.
Cyfres:	Publication (National Research Council (U.S.)) 1394. Highway research record no. 195.
Pynciau:	Automobile drivers.