Albert E Cowdrey, Land’s End, a History of the New Orleans District US Army Corps of Engineers, and Its Lifelong Battle With the Lower Mississippi and Other Rivers Wending Their Way To the Sea. US Army Corps of Engineers. (1977) (large file)
These both contain historical information on MRGO and where it fit into the larger navigation system.
Showing that the MRGO did not increase flooding with Hurricane Betsy
United States. (1968). Mississippi River-Gulf outlet, Michoud Canal, Louisiana: Letter from the Secretary of the Army transmitting a letter from the Chief of Engineers, Department of the Army, dated June 3, 1968, submitting a report … on a review of the report Mississippi River-Gulf outlet, Michoud Canal, Louisiana, requested by a resolution of the Committee on Public Works, United States Senate, adopted June 9, 1964. Washington, D.C: U.S. G.P.O.
Report on the widening of MRGO after Hurricane Betsy in 1965.