TY  - VF
TI  - Saving our soil with the A-frame
PY  - 1990///
CY  - Oklahoma, OK (USA)
PB  - World Neighbors, 
KW  - Cropping systems
KW  - AGROVOC
KW  - Soil conservation
KW  - Farming systems
N1  - The slides are availables in call=00006-F RECEPTION AREA
ER  -