@Book{bell98a,
  author =	 {Tim Bell and Ian H. Witten and Mike Fellows},
  title =	 {Computer Science Unplugged: off-line activities and
                  games for all ages},
  publisher =	 {Lulu},
  year =	 1998,
  abstract =	 {We have selected a wide range of topics from the
                  field of computer science, and packaged them so that
                  they can be learned without using a computer. They
                  will give you a good idea of what computers can and
                  can’t do, what they might be able to do in the
                  future, and some of the problems and opportunities
                  that computer scientists face now. But the main
                  reason that we wrote this book is because computer
                  science is fun. You don’t believe us?---read on!
                  The subject is bursting with fascinating ideas just
                  waiting to be explored, and we want to share them
                  with people who might not be tuned in to computers,
                  but would be interested in the ideas in computer
                  science. These activities will certainly give you
                  something to think about.},
  url = 	 {http://jmvidal.cse.sc.edu/library/bell98a.pdf}
}