TY  - BOOK
AU  - A.F. Gustafson
TI  - Conservation of the soil
U1  - 631.45 
PY  - 1937///
CY  - New York
PB  - Mc Graw Hill Book Co. Inc
N1  - A.F. Gustafson: Conservation of the soil.  New York.  Mc Graw Hill Book Co. Inc, 1937.--(631.45GUS)
ER  -