Proceedings of an International Workshop held at Ibadan, Nigeria, 10 - 14 March text Ottawa The International Development Research 1989 X, 251p ill; 25 cm ALLEY CROPPING TROPICS 631.58 631.58 INLIS000000000006038 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)