Schriften der Gesellschaft für Psychologische Forschung
- 1.1891–5.189 Harvard = Google, Chicago-USA* = Google, Wisconsin = Google, New York-USA* = Google
- 6.1893–10.1897 Wisconsin = Google, California = Google, New York-USA* = Google
- 11.1891–15.1905 Wisconsin-USA* = Google, California-USA* = Google, New York-USA* = Google
- 16.1906–20.1916 Wisconsin-USA* = Google
- 16–17 California-USA* = Google
- 18–20 California-USA* = Google