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Marsha Weinraub, Lynda Pritchard Clemens, Alan Sockloff, Teresa Ethridge, Edward Gracely, Barbara Myers, The Development of Sex Role Stereotypes in the Third Year: Relationships to Gender Labeling, Gender Identity, Sex-Types Toy Preference, and Family Characteristics, Child Development, Vol. 55, No. 4 (Aug., 1984), pp. 1493-1503
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Weinraub et al. (1984) studied this question.
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