TY  - BOOK
AU  - Gustafson, A F
TI  - Conservation of the Soil
U1  - 631.4 
PY  - 1937///
CY  - New York
PB  - Mc Graw-Hill Book Company
KW  - General Stack
KW  - Techniques, equipment & materials
KW  - Soil
KW  - Botany
ER  -