http://hdl.handle.net/2097/1734 2013-05-26T02:49:08Z http://hdl.handle.net/2097/2069 Riley County, Kansas, ZA-index-2 Index sheet 2 of 2 for flights flown between April 22, 1939 and May 15, 1939 by Aero Service Corporation, Philadelphia, PA for U.S. Dept. of Agriculture, Agricultural Adjustment Administration. Scale 1:70,400. Altitude unknown. No cloud cover. Original item size, 61 x 49 cm. 2009-11-03T20:58:03Z http://hdl.handle.net/2097/2068 Riley County, Kansas, ZA-index-1 Index sheet 1 of 2 for flights flown between April 22, 1939 and May 15, 1939 by Aero Service Corporation, Philadelphia, PA for U.S. Dept. of Agriculture, Agricultural Adjustment Administration. Scale 1:70,400. Altitude unknown. No cloud cover. Original item size, 61 x 49 cm. 2009-11-03T20:56:10Z http://hdl.handle.net/2097/2062 Riley County, Kansas, ZA-90-197 Flights flown between April 22, 1939 and May 15, 1939 by Aero Service Corporation, Philadelphia, PA for U.S. Dept. of Agriculture, Agricultural Adjustment Administration. Scale 1:12,000. Altitude unknown. No cloud cover. Original item size, 37 x 38 cm. 2009-10-30T20:03:57Z http://hdl.handle.net/2097/2061 Riley County, Kansas, ZA-91-120 Flights flown between April 22, 1939 and May 15, 1939 by Aero Service Corporation, Philadelphia, PA for U.S. Dept. of Agriculture, Agricultural Adjustment Administration. Scale 1:12,000. Altitude unknown. No cloud cover. Original item size, 37 x 39 cm. 2009-10-30T19:13:51Z