[plt-scheme] documentation on older versions of drscheme?

From: Danny Yoo (dyoo at cs.wpi.edu)
Date: Wed Dec 2 18:28:02 EST 2009

I'm trying to find documentation for PLT Scheme 4.2.1; it's no
immediately obvious how to find it on the docs.plt-scheme.org site.
Where should I be looking, if I don't want to download 4.2.1?

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