Knapp, Barbara <br/><br/>
Skill in sport :  the attainment of proficiency / 
by B. Knapp 
 - London :  Routledge & K. Paul,  1970 
 - xii, 204 p. :  illus. ;  23 cm. 
<br/><br/>'References': p. 173-184. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Physical education and training