In other discussions here I mentioned the use of The Wayback
Machine to retreive broken links and websites that produce
'not found' errors.

Today I actually used it to find some info on a firm of
city planners in a link page from James Howard Kunstler
(recommended author on the subjects of living in an
oil culture which is soon to end and urban planning.)

The info at The Wayback Machine is as complete as they claim.

Here's the link again:

• Wayback Machine from the American Library Assn.