00291nam a2200121Ia 4500082001700000100001900017245002200036260004200058300001600100490004300116500000500159700000500164  a331bF855.LE  aFreeman, R. B.  aLabor economicsb  aEnglewood-CliffsbPrentice-Hallc1972  aviii, 136p.  aFoundations of Modern Economics series  a  a