Cornell, Ethel Letitia,  1892- <br/><br/>
The effect of trait differences in ability grouping, 
by Ethel L. Cornell ... 
 - Albany,  The University of the State of New York Press,  1931. 
 - 26, [2] p.  diagrs.  23 cm. 
 - University of the state of New York bulletin ...  no. 981. Oct. 1, 1931 .
<br/><br/>"References": p. 26. 
<br/><br/><label>LCCN: </label>e  31000712  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ability.<br/>Educational tests and measurements<br/>Grading and marking (Students)<br/>Ability--Testing.
<br/><br/><label>LC Class. No.: </label>LB3061  / .C647