Irwin, Leslie William,  1900- <br/><br/>
Principles and techniques of supervision in physical education / 
by Leslie W. Irwin and James H. Humphrey 
 - Iowa :  W.C. Brown : Dubuque,  1966 
 - 348 p. :  ill. ;   24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Physical education teachers--Training of