Columbia subject headings:
Harvard subject headings:
Education--History--20th century
Education--History--Study and teaching--20th century.
Education--Study and teaching--History--20th century.
Educators--Biography
Freinet, Célestin.
Garric, Robert, 1896-1967.
Makarenko, Anton Semenovich, 1888-1939
Princeton subject headings:
Education--History--20th century.
Education--Study and teaching--History--20th century.
Freinet, Célestin.
Garric, Robert, 1896-1967.
Makarenko, Anton Semenovich, 1888-1939.