Hello

The references at the bottom of the page are partly obsolete:

1) The ones starting from "http://swiss.csail.mit.edu/ now start from
"http://groups.csail.mit.edu/mac/"

2)The ones starting from "http://www-swiss.ai.mit.edu/" now also start from
"http://groups.csail.mit.edu/mac/"

3)The links starting from "lists.r6rs.org/pipermail/r6rs-discuss/" are dead,
perhaps can be replaced with the web archive links.

4)Link 20 has double "http":
"http://http//www.r6rs.org/final/html/r6rs-rationale/r6rs-rationale.html"

5)The "Valid xhtml 1.0" button is not working on my machine,
because presumably browsers don't send referrers any more. (Or maybe
by browser is broken)

6)The page is _not_ actually a valid xhtml 1.0 page, as can be checked
by going to http://validator.w3.org/check?uri=https://srfi.schemers.org/srfi-99/srfi-99.html

--
Yours sincerely, Vladimir Nikishkin