Aerial Photo for Jefferson, Douglas Region, locality Oskaloosa, Perry, Lecompton, location T. 9-12 S., R. 18-20 E., quadrangle Oskaloosa, project Jarbalo Int. Rev. GS-VENX. Date of photo 1978-10-19. Other info Flights 1-2 NS 20000. Range of sheets 1: 52-57, 63-58. Number of sheets 12. Photo is located at T. 9-12 S., R. 18-20 E.