TY  - BOOK
AU  - Evenson Robert
AU  - Pingali Prabhu
TI  - Handbook of agricultural economics: vol 4
SN  - 978-0-444-51874-3
U1  - 338.1 
PY  - 2010///
CY  - Amsterdam
PB  - Elsevier
KW  - Agriculture-economic aspects
ER  -