33) Thesis on Mail-Art

Over the years several persons have done research on the subject of mail-art. Some of the results I have in my collection. I am quite interested in reading these results. If someone has a thesis (or even has written one him/her-selve) I would very much like to read it. Maybe some readers can also direct me to sources. I know of some works (and have read them), but welcome any new texts to explore.

I know of works by Michael Lumb (UK), Carola van der Heijden (NL), Honoria (USA). Still looking for the text written by Donavan (UK).