1. “Education in the World” (90 nations). Paris: Unesco, 1955.
2. “World Handbook of Educational Organization and Statistics” (57 nations). Paris: Unesco, 1951.
3. “World Survey of Education” (98 nations, and specializing in elementary education). Paris: Unesco, 1957.
4. For the results of these three conferences see:Service d’Edition et de Veute des Publicationes de l’Education nationale:“La Civilisation Europeene Occidentale et l’Ecole” (13 rue de Tour, Paris Vie).