(1962). Jyväskylä studies in education, psychology and social research. Univ. of Jyväskylä.
Cita Chicago Style (17a ed.)Jyväskylä Studies in Education, Psychology and Social Research. Jyväskylä: Univ. of Jyväskylä, 1962.
Cita MLA (8a ed.)Jyväskylä Studies in Education, Psychology and Social Research. Univ. of Jyväskylä, 1962.
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