Links can change without notice, and newer resources appear on a day to day basis.
This is why this list cannot be and is not complete in any way. Mr. Petri will run a links bot once a month or so to make sure the existing links are still valid. However, and this is especially true for bigger sites like Microsoft's site, sometimes the links still exist but are now used for a different purpose. If you happen to stumble on such an invalid or wrong link please let him know so he'll update this list. It's full of valuable resources.