TY  - BOOK
AU  - Gertler Paul
AU  -  Van Gaag Jacques
TI  - Measuring the willingness to pay for social sercic
T2  - Living Standards Measurement Study Working Paper. 45
U1  - X9(L:5).6598.N8, M8 
PY  - 1988///
CY  - Washington
PB  - World Bank         
KW  - Health Economics
ER  -