Evaluating irrigation system performance with measures of irrigation efficiencies text London Overseas Development Institute 1992 14p.; 21 cmm IRIGASI SISTEM 631.67 631.67 INLIS000000000000487 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)