TY  - BOOK
AU  - Tisdale, Samuel L.
AU  - Nelson, Werner L.
TI  - Soil fertility and fertilizers
T2  - Collier Macmillan International editions
U1  - 631.45 
PY  - 1975///
CY  - New York
PB  - Macmillan
KW  - Fertilizantes
KW  - Suelos
KW  - Fertilidad
ER  -