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References
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Blalock Hubert M.
Jr.
, Social Statistics , McGraw-Hill Book Co. , New York , 1960 , pp. 317 –19 .
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Dollard John
, and
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Blalock
, op. cit. , pp. 221 –25 .
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, Fundamental Statistics in Psychology and Education , 4th ed. , McGraw-Hill Book Co. , New York , 1965 , pp. 457 –58 .
