
AUTHOR:
 SAITOH Akira <s-akira@users.sourceforge.net>
URL:
 http://cgtkcalc.sourceforge.net/
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References
  [1] Eric Harlow: DEVELOPING LINUX APPLICATIONS by Eric Harlow (1999)
  [2] Eiji Takeda: GTK+ de hajimeru X programming (1999)
  [3] Hiroyuki Tanaka: GTK+ nyuumon (1999)
  [4] Tony Gale, Ian Main: GTK v1.2 Tutorial (2000)

Thanks to
  sourceforge.net
  Ulamorgikh
  MISAI
  Y. Nisida
  KAWAMURA Masao, Linux MLD.
  