TY  - BOOK
AU  - Praag, Bernard Van  .
TI  - Happiness quantified: a satisfaction calculus approach / 
SN  - 0-19-828654-6
U1  - X 
PY  - 2004///
CY  - New York : 
PB  - Oxford University Press , 
KW  - Psychology- Happiness Calculus
ER  -