Aerial Photo for Clark County, location T 30-31 S., R. 21-22 W., quadrangle Ashland 1 NW, project GS-VDCI. Date of photo 1974-04-09. Range of sheets 1-13, 15, 59, 61, 63, 79, 81, 127, 129, 131. Number of sheets 10. Photo is located at T 30-31 S., R. 21-22 W.