• publisher: Boston, New York [etc.] Houghton Mifflin company
  • creator: Langfeld, Herbert Sidney, 1879- Allport, Floyd Henry, 1890-
  • contributor: Allport, Floyd Henry, 1890-
  • Keyword: Psychology.
  • years: [c1916]
  • pages: xvi, p., 1 l., 147 p.
  • class: BF79
  • download: pdf file