Exercises and examples _The Haskell Road to Logic, Maths, and Programming_
Files from http://homepages.cwi.nl/~jve/HR/ , then perhaps modified by me.

This was originally a private repo, because I didn't want to post public
solutions to problems in a textbook.  But then I searched GitHub and found
over 20 similar repos, so I stopped worrying about that (and stopped paying
for private repos I don't need).  That said: if it is a problem, let me know!