text Washington IFPRI 1992 Ind 20 p.: 23 cm.-- 20 p.: 23 cm.-- Bibl.: p. 62-65. EMPIRIAL Demand Systems DEMAND 339.113 INLIS000000000003186 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)