TY  - BOOK
AU  - Agencey for International Development
TI  - Soil fertility requirments to attain efficient production of food crops on the extensive, deep, wel-drained but relatively infertile asid soils of the humid tropics; Annual summery prograss report 1968-1970
U1  - 631.454:633.002:631.415.2(213) 1969.7.1/1970.6.30 (083.9) L 
PY  - 1970///
CY  - Ithaca
PB  - AID
KW  - Soil Science,Soil fertility
ER  -