TY  - BOOK
AU  - Wickham Hadley
TI  - Ggplot2: elegant graphics for data analysis
SN  - 978-0-387-98140-6
U1  - 001.4226 
PY  - 2009///
CY  - New York
PB  - Springer-Verlag
KW  - Graphic methods
KW  - R (Computer program language)
ER  -