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G. M. Whipple
G. M. Whipple
Educational Psychology Monographs. No. 12. Children's Perceptions: An Experimental Study of Observations and Reports in School Children
G. M. Whipple, W. H. Winch
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Cornell Study Bulletins for Teachers, No. 2, Guide to High Shool Observation
G. M. Whipple
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