past trends and future directions text New York Cornell University 1984 viii, 74 p. ill ; 28 cm IRRIGATION ASIA PENGAIRAN 631.67 631.67 INLIS000000000005136 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)