Aerial Photo for Tuttle Creek Res Foundation Survey No. 3 Region, project GS-ZA. Date of photo 1950-08-02. Other info Used for Dr. Hopp Aerial Geology Study. Range of sheets 3G:98-105, 5G:25-28, 79, 80, 132-135, 163, 164, 179, 182. Number of sheets 22.