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32
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33by Rogers, Carl R. (Carl Ransom), 1902-1987Subjects: “...Learning, Psychology of....”
Published 1969
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35by Stevenson, Harold W. (Harold William), 1924-2005Subjects: “...Learning, Psychology of....”
Published 1972
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36
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37by Travers, Robert Morris William, 1913-Subjects: “...Learning, Psychology of....”
Published 1963
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