TY  - GEN
AU  - Ayres, Quincy Clauds
TI  - Soil erosion and its control 
U1  - 631.45 
PY  - 1936///
CY  - New York
PB  - McGraw-Hill Book Company
KW  - Specific techniques; apparatus, equipment, materials
KW  - Soil fertility, acidity, alkalinity
KW  - Soil science
ER  -