An Introduction to agricultural production economics and form management text New Delhi Tata MacGraw-Hill 1977 Cet. 1 ind 140 hlm ilus 21 cm C.A. Robertson Ekonomi pertanian 20090227020651.0 YOGYA-02090000003909 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)