What has the author William G Wilber written?

There seems to be a mistake in the name. There is no known author named "William G Wilber". It's possible there is a typo or you're thinking of a different author.

Could you please double-check the name or provide more context? For example:

* Is there a particular book or topic you're looking for?

* Do you know any other details about the author, like their nationality or time period?

With more information, I can help you find the author you're looking for.