TY  - BOOK
AU  - Simpson, Ken
TI  - Fertilizers manures
T2  - Longman handbooks in agriculture
SN  - 058244747X
U1  - 631.81 21st ed.
PY  - 1986///
CY  - London
PB  - Longman
KW  - Fertilizers
KW  - Manures
N1  - Index: p. 244-54
ER  -