00516nam a22001811 4500 1/12840 980519s1976 enk 000 0 eng d 00800179428 13287 DLC GR-PeUP 330 HA Harbury, C. D. Workbook in introductory economics/ C. D. Harbury. 2nd ed. Canada: Pergamon press, 1976. 178p.; 25 cm. Economics. INST UNIPILB MAIN 20040709 330 HA 00106549 00106549 LOAN 0 1