TY  - GEN
AU  - Ahn, Peter Martin
TI  - Tropical soils and fertiliser use
T2  - Intermediate tropical agriculture series
SN  - 0582  77507  8
U1  - 631. 819  13 AHN 
CY  - England, Longman scientific & technical ltd.
KW  - Soils -tropics/fertiliser use-tropics/shifting cultivation-soil management
ER  -