00588pamaa2200205 4500 0000050092 20140919090000.0 120425 eng 9780949606822 (pbk) HB171.5 OSB 2012 Osborne The Economics Machine : a study guide Tom Osborne and John Foreman. 20th ed.. South Australia: Fossick Publishers, 2012. 168p.: ill.; 29cm. SAM CSAM Economics Foreman, John http://www.fossick.com.au