00271nam a2200121Ia 4500020001500000082001700015100002300032245003600055260003200091300001600123500000500139700000500144  a0070379726  a330bL765.NE  aLippitt, Vernon G.  aNational economic environmentb  aNew YorkbMcGraw-Hillc1975  axiii, 551p.  a  a