1. Killay Belen, threshing wheat Collection: Billie Jean Isbell Andean Collection Location: Killay Belen (Bolivia) Date: 1981 Format: Image
2. Hillside agriculture, Imbabura Collection: Billie Jean Isbell Andean Collection Set: Vertical ecology of the Andes: Valley Location: Imbabura (Ecuador) Date: 1981 Format: Image
3. Hillside agriculture, Imbabura Collection: Billie Jean Isbell Andean Collection Set: Vertical ecology of the Andes: Valley Location: Imbabura (Ecuador) Date: 1981 Format: Image
4. Mid valley cultivation Collection: Billie Jean Isbell Andean Collection Set: Vertical ecology of the Andes: Overviews Location: Quispillaccta (Peru) Chuschi (Peru) Chuschi (Peru) Quispillacta (Peru)Quispillaqta (Peru) Date: 1981 Format: Image