Hammock, Robert C. <br/><br/>
Supervising instruction in secondary schools 
by Robert C. Hammock and Ralph S. Owings 
 - New York  McGraw-Hill  1955 
 - 316p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>School supervision, Secondary
<br/><br/><label>Dewey Class. No.: </label>P4301x73 H184