Disgrifiad
Disgrifiad o'r Eitem:"Research sponsored by the American Association of State Highway and Transportation Officials in cooperation with the Federal Highway Administration."
At head of title: National Cooperative Highway Research Program.
"November 1988."
Disgrifiad Corfforoll:76 p. : ill. ; 28 cm.
Llyfryddiaeth:Bibliography: p. 61-62.
ISBN:0309044243 (pbk.)
ISSN:0547-5570 ;