00525nam a2200217 454500 075951 BD-ChCU Eng x DLC DLC BD-ChCU 330.1/LAP Langum, John K. x Problems and questions on the principles of economics x x Boston Ginn 1939 viii, 212p. Economics, theory of Economics, theory of x ddc BK 75951 75951 0 0 ddc 30.1/LAP 0 0 CUL CUL GEN 2015-06-14 Purchase 0 330.1/LAP 13597 2015-09-13 00:00:00 1 2015-09-13 BK x