TY  - BOOK
AU  - SUMNER L. W.
TI  - Welfare happiness and ethics
SN  - 0198244401
U1  - R4941, N6 
PY  - 1996///
CY  - Oxford
PB  - Clarendon Press         
KW  - Ethics
N1  - Bib.p-225-34
ER  -