TY  - BOOK
AU  - Richard M Lerner  (ed.)
AU  - Rainer K Silbereisen (ed.)
TI  - Approaches to positive youth development
SN  - 9781412922883
U1  - 305.235 
PY  - 2007///
CY  - Los Angeles
PB  - Sage
KW  - Youth development
KW  - Social Sciences
ER  -