[plt-scheme] Tree recursion

From: Jos Koot (jos.koot at telefonica.net)
Date: Thu Jan 24 08:04:07 EST 2008

From: "Robby Findler" wrote
> http://www.htdp.org/ should be running just fine...?
> 
> Note that these options are available in the professional languages, too.
> 
> Robby

Thanks, found the free available text again.
Jos


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