00865cam a22002291 4500 es 20000001 DLC 20260227111236.0 800506s1919 dcuabef f000 0 eng c es 20000001 (OCoLC)6287280 U.S. Engineer School Libr. OCl DLC premarc UG1 .U5 no. 58 U.S. Army Engineer School. Pamphlet on the evolution of the art of fortification. Prepared under the personal direction of Major General William M. Black, chief of engineers, U.S. army. 1919. Washington, Govt. print. off., 1919. 107 p. XXVIII pl. (incl. fold. map) plans (1 fold.) diagrs. 23 cm. Occasional papers, Engineer school, U.S. army, no. 58 Fortification. Black, William Murray, 1855-1933. 22314 22314