TY  - SER
AU  - Orvedal, A.C.
TI  - Bibliography of soils of the tropics vol.4: tropics in general and islands of the pacific and indian oceans
T2  - A.I.D. research & development abstracts ; 
PY  - 1981///
CY  - Washington-US : 
PB  - United States Agency for International Development, 
N1  - Artículo dentro de: Agriculture-soil science; Sumarios de investigación
ER  -