A methodology for on - farm cropping systems research text Philippines The International Rice Research Institute 1981 N 142 hlm. 22 cm 631. 072 631. 072 Zam m INLIS000000000000148 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)