Signature of <a href="https://en.wikipedia.org/wiki/John_G._Hawthorne_signature" class="extiw" title="w:John G. Hawthorne signature">John G. Hawthorne</a>, taken from the cover of his dissertation
John G. Hawthorne
1949-06-08
Hawthorne's dissertation <a rel="nofollow" class="external text" href="https://search.proquest.com/docview/301854564">on ProQuest</a>