Planning conservation of the physical environment ; 5 reports.

Bibliographic Details
Corporate Authors:	National Research Council (U.S.). Highway Research Board, National Research Council (U.S.). Highway Research Board. Dept. of Economics, Finance and Administration, National Research Council (U.S.). Highway Research Board. Dept. of Urban Transportation Planning, National Research Council (U.S.). Highway Research Board. Dept. of Soils, Geology and Foundations
Format:	Book
Language:	English
Published:	Washington, D.C. National Academy of Science - National Research Council 1969.
Series:	Highway research record no. 271.
Subjects:	Conservation of natural resources.