Robert D Krebs, R. D. W. (1971). Highway materials. McGraw Hill.
Chicago Style (17th ed.) CitationRobert D Krebs, Richart D Walker. Highway Materials. McGraw Hill, 1971.
MLA (8th ed.) CitationRobert D Krebs, Richart D Walker. Highway Materials. McGraw Hill, 1971.
Warning: These citations may not always be 100% accurate.