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 Walter Stenning
 
 Hereford, Carl F.; Selz, Nina; Stenning, Walter; Natalicio, Luiz F. S. (1967): A cross-cultural comparison of the active-passive dimension of social attitudes [A cross-cultural comparison of the active-passive dimension of social attitudes]. R. interam. Psicol. 1(1), 33-39 (eng.).