Westby-Gibson, Dorothy <br/><br/>
Grouping students for improved instruction / 
by Dorothy Westby-Gibson 
 - Englewood Cliffs, N.J. :  Prentice-Hall International,  1966 
 - 64 p. ;  23 cm. 
<br/><br/>Bibliography : p. 59-64. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ability grouping in education