00383n a2200169 a 4500 B B 000563 20220201161846.0 330 M5 ECO Lipsey, Richard G An introduction to positive economics 6th London E.L.B.S. 1985 790p. Economics,Economics T 0 0 0 0 SGGSCC SGGSCC 2020-09-22 157.50 0 330 M5 ECO 643 2020-09-22 00:00:00 157.50 2020-09-22 BK 556 556