TY  - BOOK
AU  - Ragland,John
AU  - Rattan,L.
TI  - Technologies for sustainable agriculture in the tropics: proceedings of two international symposia sponsored by Division A-6 of the American Society of Agronomy in San Antonio, TX, and Denver, CO, 1990 and 1991 respectively 
SN  - 0891181180
AV  - S481.A4 1993  
U1  - 630 s338.1/0913 
PY  - 1993///
CY  - Madison, Wis., USA
PB  - American Society of Agronomy
KW  - Sustainable agriculture--Congresses
ER  -