Columbia subject headings:
Ankara (Turkey)--Description and travel.
China--Economic conditions--1912-1949.
Communism--Soviet Union.
Dewey, John, 1859-1952.
Eastern question (Balkan)
Education--Soviet Union.
Mexico--Social conditions.
Harvard subject headings:
Ankara (Turkey)--Description and travel.
China--Economic conditions--1912-1949.
Communism--Soviet Union
Dewey, John, 1859-1952
Eastern question (Balkan)
Education--Soviet Union
Mexico--Social conditions.
Princeton subject headings:
Ankara (Turkey)--Description and travel.
China--Economic conditions--1918-.
Communism--Soviet Union.
Dewey, John, 1859-1952.
Eastern question (Balkan)
Education--Soviet Union.
Mexico--Social conditions.