The fundamental principles of learning and study . *f 8 Z 6 2o Z4 Z8 Jz 36 Weeks of practice Figure 7. Fig. 7. Improvement in telegraphy. E. L. B. (Bryan and Harter, 13a),

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Keywords: ., bookcentury1900, bookdecade1920, bookpublisherbalti, bookyear1920