2. 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
3. Dry season Collection: Billie Jean Isbell Andean Collection Set: Vertical ecology of the Andes: Valley Location: Chuschi (Peru) Date: 1967 Format: Image
4. Rainy season Collection: Billie Jean Isbell Andean Collection Set: Vertical ecology of the Andes: Valley Date: 1967 Format: Image
5. 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
6. Hillside agriculture Collection: Billie Jean Isbell Andean Collection Set: Vertical ecology of the Andes: Valley Date: 1996 Format: Image
12. Hillside agriculture Collection: Billie Jean Isbell Andean Collection Set: Vertical ecology of the Andes: Valley Date: 1996 Format: Image
13. Hillside agriculture Collection: Billie Jean Isbell Andean Collection Set: Vertical ecology of the Andes: Valley Date: 1996 Format: Image
14. Hillside agriculture Collection: Billie Jean Isbell Andean Collection Set: Vertical ecology of the Andes: Valley Date: 1996 Format: Image
15. Hillside agriculture Collection: Billie Jean Isbell Andean Collection Set: Vertical ecology of the Andes: Valley Date: 1996 Format: Image
16. Hillside agriculture Collection: Billie Jean Isbell Andean Collection Set: Vertical ecology of the Andes: Valley Date: 1996 Format: Image
17. Hillside agriculture Collection: Billie Jean Isbell Andean Collection Set: Vertical ecology of the Andes: Valley Date: 1996 Format: Image
24. Potato fields, La Unión Collection: Billie Jean Isbell Andean Collection Set: Vertical ecology of the Andes: Puna Location: Quispillaccta (Peru) Quispillacta (Peru)Quispillaqta (Peru) Date: 2001 Format: Image
25. Rio Pampas Valley Collection: Billie Jean Isbell Andean Collection Location: Pampas River Valley (Peru) Date: 2002 Format: Image
26. Rio Pampas Valley Collection: Billie Jean Isbell Andean Collection Location: Pampas River Valley (Peru) Date: 2002 Format: Image
27. Rio Pampas Valley approaching Chuschi Collection: Billie Jean Isbell Andean Collection Set: Vertical ecology of the Andes: Valley Location: Chuschi (Peru) Pampas River Valley (Peru) Date: 2002 Format: Image
28. Rio Pampas Valley approaching Chuschi Collection: Billie Jean Isbell Andean Collection Set: Vertical ecology of the Andes: Valley Location: Chuschi (Peru) Pampas River Valley (Peru) Date: 2002 Format: Image
29. Rio Pampas Valley approaching Chuschi Collection: Billie Jean Isbell Andean Collection Set: Vertical ecology of the Andes: Valley Location: Chuschi (Peru) Pampas River Valley (Peru) Date: 2002 Format: Image
30. Rio Pampas Valley approaching Chuschi Collection: Billie Jean Isbell Andean Collection Set: Vertical ecology of the Andes: Valley Location: Chuschi (Peru) Pampas River Valley (Peru) Date: 2002 Format: Image