Here at Wisconsin we didn't get an undergraduate course in mathematical logic until the '60s.
I think that after Church got his Ph.D. he studied in Europe, maybe in the Netherlands, for a year or two.
I went to Princeton in the fall of 1930 as a half-time instructor.
In the fall term of 1933-34 I was on my family farm in Maine.
It wasn't until my second year that I got to actually work with Church.
I'm sure Church got some of his ideas from this trip to Europe.