What has the author Gertrude Fass written?

There is no widely known author named "Gertrude Fass". It's possible that there is a lesser-known author with that name, but without more information, it's difficult to find any specific works.

Could you please provide more context or details? For example:

* Are you sure about the spelling?

* Do you have any other information about this author, such as their genre or time period?

* Is there a specific book or work you are looking for?

With more information, I might be able to assist you in finding information about this author.