Aerial Photo for Riley County, project GS-RL. Date of photo 1986-03-29. Other info 19873. Range of sheets "29:375, 376, 378, 380, 382, 384, 386, 387, 388, 406, 434, 454, 455, 456, 458, 460, 462, 464, 466, 468, 470, 472, 476, 478, 479, 480, 538, 540, 594, 596". Number of sheets 30.