TY - BOOK AU - Dobney,Fredrick J. TI - River engineers on the middle Mississippi: a history of the St. Louis District, U.S. Army Corps of Engineers U1 - 627.0977 PY - 1978///] CY - Washington PB - For sale by the Supt. of Docs., U. S. Govt. Print. Off. KW - Hydraulic engineering KW - Mississippi River Valley KW - History KW - MCE N1 - Includes index ER -