TY  - GEN
AU  - Knapp, B.
TI  - Skill in sport: the attainment of proficiency
SN  - 0710016913
U1  - 796 
PY  - 1963///
CY  - London
PB  - Routledge & kegan paul
KW  - ATHLETIC AND OUTDOOR SPORTS AND GAMES
ER  -