text Oxford Pergamon Press 1970 Ing xiii, 248 p.: ill.; 22 cm. Keith Cowling; David Metcalf; A.j. Rayner AGRICULTURE ECONOMIC ANALYSIS RESOURCES 631.16 631.16 COW r INLIS000000000003716 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)