TY  - BOOK
AU  - Buresh, Roland J.
AU  - Calhoun, Frank
AU  - Sánchez, Pedro A.
TI  - Replenishing soil fertility in Africa: proceedings of an international symposium
U1  - 631.4 
PY  - 1997///
CY  - Madison
PB  - Soil Science Society of America
KW  - Suelos
KW  - Fertilidad
KW  - Africa
ER  -