Discrete Mathematics with Duckshttp://www.amazon.com/gp/product/1466504994/ref=as_li_ss_tl?ie=UTF8&tag=quasika-20&linkCode=as2&camp=1789&creative=390957&creativeASIN=1466504994 by coupdegrace • 14 years ago 2 0 14 years agoAMamazon.com