Contact: Hadley Wickham <h.wickham@gmail.com>
Name: ggplot2
Reference:
  Author: Hadley Wickham
  BookTitle: "ggplot2: elegant graphics for data analysis"
  Publisher: Springer New York
  Year: 2009
  ISBN: 978-0-387-98140-6
  URL: http://had.co.nz/ggplot2/book
