TY  - BOOK
AU  - Knowles,Frank.
AU  - Watkin,Elphin J.
TI  - A practical course in agricultural chemisty
U1  - 631.41 
PY  - 1960///
CY  - London.
PB  - Macmillan
KW  - Agricultural Chemisty
KW  - Soil Chemistry/Analysis
ER  -