00291nam a2200109 a 450000500170000008200160001710000230003324500510005626000320010730000280013963000140016720251202164232.0  a338.52bLEF  aLefwich, Richard R  aPrice system and resource allocation economics  aChicagobDryden Pressc1985  aXXII,631 p.c24 cm.bPB  aEconomics