Heber, Rick F. <br/><br/>
Epidemiology of mental retardation 
by Rick Heber. 
 - Springfield, Ill.  Thomas  [1970] 
 - xiii, 119 p.  illus. 
<br/><br/>Bibliography: p. 100-112. 
<br/><br/><label>LCCN: </label>79105630 //r84 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mental Retardation
<br/><br/><label>LC Class. No.: </label>RC570  / .H4 
<br/><br/><label>Dewey Class. No.: </label>616.85/88