Irion, Theophil William Henry,  1885- <br/><br/>
Comprehension difficulties of ninth grade students in the study of literature / 
by Theo. W.H. Irion 
 - New York :  Columbia University,  1925 
 - v, 116 p. :  incl. tables. ;  24 cm. 
 - Contributions to education ;  no.189. .
<br/><br/> Published also as thesis (Ph. D.), Columbia University, 1925. 
<br/><br/>Bibliography : p. 77-79. 
<br/><br/><label>ISBN: </label>0404551890 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English literature--Study and teaching<br/>Educational tests and measurements