TY  - BOOK
AU  - Rattan Lal
TI  - Sustainable management of soil resources in the humid tropics
U1  - U672(J:1).192.N9, N5/TD1 
PY  - 1995///
CY  - Tokyo
PB  - United Nations university Press Japan      
KW  - Agricultural Geography
N1  - Bib p. 138-46
ER  -