151.2
C
 Courtis, Stuart Appleton, 1874-
   Why childern succeed; a study of the factors conditioning the progress of children in school, and of the problems that must be solved before the relationships between the factors school success can be realiably determined, by Stuart Appleton Courtis... Detroit, Mich., Courtis standard test [1925]
   271 p. incl. illus. tables, diagrs. 20 cm.