Those three years ended with June 1933. At that time I left Princeton, having submitted my Ph.D. thesis.
-- Stephen Cole Kleene
   
Stephen Cole Kleene   Name:
Stephen Cole Kleene
Type:
Mathematician
Nationality:
American
Birth:
January 5, 1909
Death:
January 25, 1994
https://www.nutquote.com/quote/Stephen_Cole_Kleene