Testing (1) Development (1) Communication (1) Terms and phrases (1) Aerial photographs (1) Methods (1) Terms and phrases (1) Photographs (1) Aerial views (1) Aerial photographs (1) Land mines (1) Photography--Digital techniques (1) Vision (1) Theater (1) Silver (1) Science (1) Production (Economic theory) (1) Possibility (1) Photogrammetry (1) Mines and mineral resources (1) Mines (Military explosives) (1) Metal-work, Prehistoric (1) Hand (1) Foundries (1) Electronic digital computers (1) Computers (1) Commercial products (1) Archaeology (1) A priori (1) Methods (1)