TY  - BOOK
AU  - Cox, Joseph Frank.
AU  - Lyman, E. Jackson.
TI  - Crops: : a self-teaching course : based on crop management and soil conservation
U1  - 633 
PY  - 1937///
CY  - New York
PB  - Wiley
KW  - Cultivos
KW  - E.U.A
KW  - Suelos
KW  - Conservación
N1  - 2c. ed. x EVA. Romed forces Institute
ER  -