1. Hillside agriculture, Mantaro Valley near Pampas Collection: Billie Jean Isbell Andean Collection Set: Vertical ecology of the Andes: Valley Location: Pampas River Valley (Peru) Date: 1967 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. Chuschi Collection: Billie Jean Isbell Andean Collection Set: Vertical ecology of the Andes: Valley Location: Chuschi (Peru) Date: 1996 Format: Image
5. Chuschi Collection: Billie Jean Isbell Andean Collection Set: Vertical ecology of the Andes: Valley Date: 1996 Format: Image
6. Chuschi Collection: Billie Jean Isbell Andean Collection Set: Vertical ecology of the Andes: Valley Date: 1996 Format: Image
7. Cancha Cancha Collection: Billie Jean Isbell Andean Collection Set: Vertical ecology of the Andes: Valley Date: 1996 Format: Image
8. Hillside agriculture Collection: Billie Jean Isbell Andean Collection Set: Vertical ecology of the Andes: Valley Date: 1996 Format: Image
9. Hillside agriculture Collection: Billie Jean Isbell Andean Collection Set: Vertical ecology of the Andes: Valley Date: 1996 Format: Image
10. Hillside agriculture Collection: Billie Jean Isbell Andean Collection Set: Vertical ecology of the Andes: Valley Date: 1996 Format: Image