The principles of teaching : based on psychology / Edward L. Thorndike. Thorndike, Edward L. (Edward Lee), 1874-1949. Teaching. Educational psychology. 370.15 THP Includes index. "Topics for further study, with references": p. 274-280. "Sources of quotations": p. 281-285. New York : A.G. Seiler, 1906. 1906. 1906 Text xii, 293 p. ; eng