TY  - BOOK
AU  - Ericsson,K.Anders
TI  - Development of professional expertise: toward measurement of expert performance and design of optimal learning environments 
SN  - 9780521518468 (hardback)
U1  - 153.83 
PY  - 2009///
CY  - New York
PB  - Cambridge University Press
KW  - Expertise
KW  - Professional employees
KW  - Performance
ER  -