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 Carl F. Hereford
 
 Fernández, Gustavo; Lara Tapia, Luis; Hereford, Carl F. (1970): Réplica de factores en el Inventario de Intereses Profesionales de Hereford [Factor replication in the Hereford Professional Interest Inventory]. R. interam. Psicol. 4(1), 51-57 (esp.). 
 
 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.).