Columbia subject headings:
Pyle, Ernie, 1900-1945--Travel--United States.
United States--Description and travel.
United States--Social conditions--1933-1945.
Harvard subject headings:
Pyle, Ernie, 1900-1945--Journeys--United States.
Pyle, Ernie, 1900-1945--Travel--United States.
United States--Description and travel.
United States--Social conditions--1933-1945.
Princeton subject headings:
Pyle, Ernie, 1900-1945--Travel--United States.
United States--Description and travel.
United States--Social conditions--1933-1945.