The economics of rice-fish production sytems in North Sumatra, Indonesia text KIel Wissenschaftsverlag vauk kiel KG. 1998 x, 181 p. : ill.; 21 cm RICE FISH CULTURE PRODUCTION ECONOMICS NORTH SUMATRA 633.18 633.18 INLIS000000000003198 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)