Exceptional children :  An Introduction to special education / 
Heward William L. 
 - 9th ed. 
 - Ohio;  Pearson/Prentice hall ,  2009. 
 - xix,601[7,15,69,25] p,:  ill,; 
<br/><br/><label>ISBN: </label>9780131362871 
<br/><br/><label>LC Class. No.: </label>LC3981  / .H42