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:87 pages : illustrations, charts, forms ; 28 cm.
Bibliography:Includes bibliographical references (pages 62-65).
ISBN:0309069505
ISSN:0547-5570 ;