An experimental study upon three hundred school children over a six-year period; from the Department of psychology of Duke university, by Nathaniel D. Mttron Hirsch ...
|Main Author:||Hirsch, Nathaniel David Mttron, 1896-|
Worcester, Mass., Clark university, c1930.
Genetic psychology monographs.
|Original Classification Number:||LB 1131 .H669|
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