TY  - BOOK
AU  - Worthen, Edmund L.
AU  - Aldrich, Samuel R.
TI  - Farm soils: : their fertilization and management
U1  - 631.4 
PY  - 1956///
CY  - New York
PB  - Wiley
KW  - Fertilizantes y abonos
KW  - Suelos
ER  -