DP - MPI Library TY - JOUR AU - Haferkorn, Henry E. T1 - Articles of Engineering Interest UR - https://www.jstor.org/stable/44535246 T2 - Professional Memoirs, Corps of Engineers, United States Army, and Engineer Department at Large SP - Vol. 9, No. 48 (1917), p. xi-xvi PY - 1917 ER -