TY  - BOOK
AU  - Wickham,Hadley
TI  - Ggplot2: elegant graphics for data analysis 
T2  - Use R!
SN  - 9780387981406
AV  - QA90 W524G
PY  - 2009///
CY  - New York, N.Y.
PB  - Springer
KW  - Graphic methods
KW  - R (Computer program language)
N1  - Includes bibliographical references and indexes
ER  -