It would seem logical to anybody who has perused this page or my blogs that a search of Eastern Michigan Univeristy + Gundella + Marcello Truzzi would not only serve up one but numerous articles on the aforementioned two persons owing to the latter's friendship with the former and his work relationship with the first. But I don't function in such a manner so I get there through back channels.
9 pages into the publication will give you the second, Gundella the Witch.
While searching for one of the ever-elusive witch diplomas of Gundella I stumbled upon this article about her sociologist professor friend Marcello Truzzi.
Also shown is Truzzi holding his book Cauldron Cookery which was published in 1969.