Letter from John V. Atanasoff to International Resistance Company regarding the stability of resistors, November 14, 1939. The letter details a request for information on variation in the values of resistors as well as the typical life history.
Letter from John V. Atanasoff letter to Harry A. Ehle of the International Resistance Company regarding the purchase of resistors, January 4, 1940. The letter details a request to acquire 600 resistors to be used in the completion of a machine Atanasoff is building.
Letter from John V. Atanasoff letter to Harry A. Ehle of the International Resistance Company regarding the purchase of resistors, February 19, 1940. The letter requests a price quote for the tentative list of resistors that Atanasoff wants to acquire.
