Bevat bijdragen in het Engels, Duits en Frans
VIIIth International Congress of Psychology, held at Groningen from 6 to 11 september 1926, under the presidency of G. Heymans : proceedings and papers
VIIIth International Congress of Psychology, held at Groningen from 6 to 11 september 1926, under the presidency of G. Heymans : proceedings and papers / ed. by the National Committee