Rational psychology, or, The subjective idea and the objective law of all intelligence / by Laurens P. Hickok.
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Rational psychology, or, The subjective idea and the objective law of all intelligence / by Laurens P. Hickok. Credit: This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.). Public Domain Mark