関連書籍
・Introduction to Functional Programming Using Haskell
　http://www.amazon.co.jp/exec/obidos/ASIN/0134843460/
・Haskell: The Craft of Functional Programming
　http://www.amazon.co.jp/exec/obidos/ASIN/0201342758/
・The Fun of Programming
　http://www.amazon.co.jp/exec/obidos/ASIN/1403907722/
・The Haskell School of Expression: Learning Functional Programming Through Multimedia
　http://www.amazon.co.jp/exec/obidos/ASIN/0521644089/
・入門Haskell
　http://item.rakuten.co.jp/book/1794880/
・ふつうのHaskellプログラミング
　http://item.rakuten.co.jp/book/4052963/