TY  - JOUR 
T1  - Economic efficiency of agricultural production in Brazil
JO  - Revista de Economia e Sociologia Rural
A1  - Vicente, José R.
SN  - 0103-2003
UL  - 10.1590/S0103-20032004000200002
VL  - 42 
Y1  - 2004
PB  - Brasil 
ER  -