[plt-scheme] More fun with typed scheme: attempt to write vector-join and a minor rant

I missed this footnote:

On Mon, Nov 2, 2009 at 8:18 AM, Sam TH <samth at ccs.neu.edu> wrote:
> more help is always appreciated [1].

[1] http://blog.plt-scheme.org/2009/02/call-for-participation-writing-typed.html
-- 
sam th
samth at ccs.neu.edu