Hanford Document No. HAN-43508, September 1943
Memorandum covering technical basis for work under Contract numbered W-7412 Eng-1 between the United States of America (herein called the "Government") and E.I. du Pont de Nemours & Company (herein called the "Contractor"), constituting part of the record of negotiations in connection with the said Contract, referred to on the first page of the Contract, and approved and agreed to by the Government, the Contractor and the University of Chicago.