1. Behrens PJ (1979) Max Friedrich's study of apperception; the first dissertation in experimental psychology. Invited Centennial Address presented at Annual Meeting of the American Psychological Association, New York, September 1979
2. Benjamin L (1979) A century of science. APA Monitor 10:1?3
3. Bl�ttner F (1951) Geschichte der P�dagogik. Heidelberg: Quelle & Meyer
4. Blunk R (1940) Justus von Liebig. Hamburg: Hammerich & Lesser
5. Boring EG (1929) A history of experimental psychology. New York: Appleton