• publisher: New York city, Teachers college, Columbia university
  • creator: Toops, Herbert Anderson, 1895-
  • Keyword: Vocational education. Educational tests and measurements
  • years: 1921.
  • pages: vi, 118 p.
  • class: LC1043
  • notes: Published also as thesis (Ph. D.) Columbia university, 1921.
  • download: pdf file