Collins, Horatio John. Principles of road engineering, by H. John Collins ... and C. A. Hart ... - London, E. Arnold & co., 1936. - xv, 1, 628 p. incl., front., tables. illus., xx fold. pl., maps, diagrs. 24 cm. - The Roadmakers' library, vol. VI . Series title in part at head of t.-p. Subjects--Topical Terms: MCERoads. Dewey Class. No.: 625.7 / COL