Burckhardt, Carl Jacob (1891-1974)(3)
Ranke, Leopold von (1795-1886)(3)
Guggenmos, Josef (1922-2003)(2)
Leibniz, Gottfried Wilhelm (1646-1716)(2)
Association for Childhood Education International(1)
Atrium Verlag. London Office(1)
Aubin, Bernhard C. H. (1913-2005)(1)
Berendsohn, Walter A. (1884-1984)(1)
Berneker, Erich (1905-1983)(1)
Bezold, Wilhelm von (1837-)(1)