TY  - JOUR 
T1  - Identification of croplands of winter cereals in Rio Grande do Sul state, Brazil, through unsupervised classification of normalized difference vegetation index images
JO  - Engenharia Agrícola
A1  - Junges, Amanda H.
A1  - Fontana, Denise C.
A1  - Pinto, Daniele G.
SN  - 0100-6916
UL  - 10.1590/S0100-69162013000400027
VL  - 33 
Y1  - 2013
PB  - Brasil 
ER  -