Technical Memorandum ORO-T-117 by the ORO (Operations Research Office), specifically by researchers Alvin D. Cook and L.Van Loan Naisawald and dated March 1, 1951. Although tank destroyers are not covered in the report, I do believe some of the information would be interesting to tank destroyer researchers as well. Please note that the ORO was housed at Fort Leslie J. McNair, in Washington D.C. Lt. General McNair was an advocate for the tank destroyer forces in 1941, but was killed by Allied bombs of the Eighth Air Force, on on July 25, 1944, near Saint-Lô, France.