Columbia subject headings:
Harvard subject headings:
Dragoumēs, Iōn, 1878-1920--Knowledge--Educational innovations.
Dragoumēs, Iōn, 1878-1920.
Educational innovations--Greece--History--20th century.
Greek language, Modern--Social aspects.
Princeton subject headings:
Dragoumēs, Iōn, 1878-1920.
Educational innovations--Greece--History--20th century.
Greek language, Modern--Social aspects.