text Medan Balai Penelitian Perkebunan Medan 1988 50 p. ; 25 cm KARET - ABSTRAK KARET ABSTRAK PERKEBUNAN MEDAN Ref.633.91 Ref.633.91 INLIS000000000004374 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)