00342nam a22001217a 450000500170000002000160001708200220003310000210005524500570007626000560013330000100018970000210019920260205145319.0  a	0801845319  a	338.13091 SCH.N2  a	Schiff, Maurice  aThe political economy of agricultural pricing policy  aBaltimore:b Johns Hopkins University Press,c	1992  a268p.  a Valdes, Alberto