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'''Tcl 2004'''
   * [http://tclers.tk/Tcl2004-StateOfTcl.zip]: The Active State of Tcl - [Jeff Hobbs]
   * [http://www.man.ac.uk/~zzcgudf/tcl/tcl2k4_presentation.pps]: 8.5 and OO - [Donal Fellows]
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