00486nam a22001577a 4500003000800000005001700008008004100025040002100066082001300087110004100100245004400141260006300185300002500248650001300273710004200286BD-DhUL20181212101629.0160529s1950    xxua|||| |||| 000 0 eng d  aBD-DhULcBD-DhUL  a330bCON1 aNaional Bureau of Economic Research.00aStudies in income and wealth :bv. 12 /  aNew York :bNational Bareau of economics research, c1950.  av. :bill. ;c23 cm.  aEconomic  aNational Bareau of economics research