TY  - BOOK
AU  - Ahmad Sultan
AU  - World Bank
ED  - World Bank
TI  - Approaches to purchasing power parity and real produt comparsion using shortcuts and reduced information
T2  - World Bank Staff Working Paper.418
U1  - "X:31, M0/UN" 
PY  - 1980///
CY  - Washington
PB  - World Bank      
KW  - National Income
N1  - Bibliography: P 58-60
ER  -