Aerial Photo for Clay, Dickinson, Marion Region, locality Chapman, location T. 10-17 S., R. 4 E., project AYH and AYH-AIE. Date of photo 1939-04-22. Other info Flight 12. Range of sheets 90-17 to 3, 8R-20 to 44, 19-77 to 73. Number of sheets 44. Photo is located at T. 10-17 S., R. 4 E.