00510nam a2200133Ia 4500082002000000100005000020110002200070245015100092260005200243300001400295500000500309710003300314710002900347  a339.31bUn58.SI  aUnited Nations. Statistical Office and Others  aKravis, Irving B.  aSystem of international comparisons of gross product and purchasing powerbcBy Irving B. Kravis, Zoltan Kenessey, Alan Heston and Robert Summers.  aBaltimorebJohns Hopkins University Pressc1975  axi, 294p.  a  aKenessey, Zoltan ; jt. auth.  aHeston, Alan ; jt. auth.