Gregson, R. A. M. (1963). A Study in the psychometrics of substitution choises. Dep. of Psychology and Sociology.
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Chicago-čujuhus (17. p.)
Gregson, R. A. M. A Study in the Psychometrics of Substitution Choises. Christchurch: Dep. of Psychology and Sociology, 1963.
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MLA-čujuhus (9. p.)
Gregson, R. A. M. A Study in the Psychometrics of Substitution Choises. Dep. of Psychology and Sociology, 1963.
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