Petty Walter T <br/><br/>
Language arts in elementary schools 
Petty Walter T 
 -  1962 
<br/><br/><label>Standard No.: </label>149,587 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>EDUCATION
<br/><br/><label>Dewey Class. No.: </label>T15:3:(P:12), K2