Description
Item Description:At head of title: National Cooperative Highway Research Program.
"Research sponsored by the American Association of State Highway and Transportation Officials in cooperation with the Federal Highway Administration."
"Transportation Research Board, National Research Council."
Physical Description:84 pages, 44 unnumbered pages : illustrations ; 28 cm.
Bibliography:Includes bibliographical references (pages 81-83).
ISBN:0309060737
ISSN:0077-5614 ;