Columbia subject headings:
Panama-Pacific International Exposition (1915 : San Francisco, Calif.)
United States--Social life and customs--1865-1918.
Harvard subject headings:
Panama-Pacific International Exposition (1915 : San Francisco, Calif.)
United States--Social life and customs--1865-1918.
Princeton subject headings:
Panama-Pacific International Exposition (1915 : San Francisco, Calif.)
United States--Social life and customs--1865-1918.