TY  - BOOK
AU  - Tisdale,Samuel L.
AU  - Nelson,Werner L.
TI  - Soil fertility and fertilizers
U1  - 631.8 
PY  - 1966///
CY  - London
PB  - Macmillan
KW  - Fertilizers
KW  - Soil productivity
KW  - Soil fertility
N1  - Includes index
ER  -