Hammock, Robert C,  1908- <br/><br/>
Supervising instruction in secondary schools /  
Robert C Hammock  
 - McGraw-Hill :  London ;   1955 
 - 316 p ;   23 cm.  
 - McGraw-Hill series in education .
 - McGraw-Hill series in education .
<br/><br/><label>Subjects--Topical Terms: </label><br/>School supervision, Secondary
<br/><br/><label>Dewey Class. No.: </label>373  / HAS 1955