Hammock Robert C <br/><br/>
Supervising instructions in secondary schools 
Hammock Robert C; Owings Ralphs S 
 -  1955 
 - Mcgraw hill series in education ed by Harold benjamin .
<br/><br/><label>Standard No.: </label>87,171 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>EDUCATION
<br/><br/><label>Dewey Class. No.: </label>T2:83, J5