TY  - BOOK
AU  - Ryan, J. G.
TI  - Future challenges and opportunities for agricultural R&D in the semi-arid tropics
SN  - 9290664398
PY  - 2001///
CY  - Andhra Pradesh, India
PB  - International Crops Research Institute for the Semi-Arid Tropics
KW  - Agricultura
KW  - Trópicos
ER  -