1. The principles of psychology. Part 1, The data of psychology Author(s): Spencer, Herbert, 1820-1903, author Publication: New York : D. Appleton and Company, 1869 Subject(s): PsychologyNervous System Physiological Phenomena
2. The principles of psychology Author(s): Spencer, Herbert, 1820-1903, author Publication: New York : D. Appleton and Company, 1871 Subject(s): Psychology
