00897nam0-22002891i-450-99000625538040332119980601000625538FED01000625538(Aleph)000625538FED0100062553819980601d1956----km-y0itay50------ba--------00-yyResource and Output Trends in the United States since 1870Moses Abramovitz.New YorkNational Bureau of Economic Research195623 p.24 cmOccasional paperNational bureau of economic research52330Abramovitz,Moses118633ITUNINARICAUNIMARCBK990006255380403321XV C 64 (52)59844FGBCFGBCResource and Output Trends in the United States since 1870637898UNINAGIU01