TY  - JOUR 
T1  - Basic principles of graphing data
JO  - Scientia Agricola
A1  - Kozak, Marcin
SN  - 0103-9016
UL  - 10.1590/S0103-90162010000400017
VL  - 67 
Y1  - 2010
PB  - Brasil 
ER  -