Raising and sustaining Productivity of Smallholder Farming Systems in the Tropics A. Handbook of Sustainable Agricultural Development text Alkmaar Holland: Ag Be Publishing 1990 XVI, 738p; ill; 27 cm FARMING SYSTEMS TROPICS AGRICULTURAL DEVELOPMENT Ref. 631. 58 Ref. 631. 58 INLIS000000000005867 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)