Ayers, Ronald M. and Robert A. Collinge Economics: Explore & apply - Enhanced ed. - Upper Saddle River, New Jersey Pearson Prentice Hall 2003 - 796p. ISBN: 0-13-146394-2 Subjects--Topical Terms: 1. Economics2. Microeconomics3. Macroeconomics LC Class. No.: HB 171.5 / .A888 2003