TY  - BOOK
AU  - Sangatanan,Pedro D.
TI  - How to Prepare Organic and Organo- Inorganic Fertilizer
SN  - 20031
U1  - 631.8 S5h 
PY  - 1985///
CY  - Manila
PB  - Rex Book Store, 
KW  - Fertilizers, soil conditioners, growth regulators
ER  -