TY  - BOOK
AU  - Knapp,Barbara
TI  - Skill in sport : : the attainment of proficiency/ 
U1  - 796 KNA 
PY  - 1963///
CY  - London : 
PB  - Routledge & K. Paul , 
KW  - Sports
N1  -  Includes bibligraphical references
ER  -