00472nam a2200193 454500001000700000003000800007008001700015020001100032040002200043082001500065100002400080245006300104250000700167260002600174300001700200504000500217650004900222700000700271075951BD-ChCU          Eng     ax       aDLCcDLCdBD-ChCU00a330.1/LAP 1 aLangum, John K. bx10aProblems and questions on the principles of economics bx   ax   aBoston bGinn c1939   aviii, 212p.   a 0aEconomics, theory of bEconomics, theory of 1 ax