na INLIS000000000055479 20230715010736 0010-0822000259 ta 230715 g 1 ind 633.91 633.91 BAL p Program penelitian karet / Balai Penelitian Perkebunan Medan Medan : Balai Penelitian Perkebunan Medan, 1978 17 p. : ill. ; 30 cm. HEVEA BRASILIENSIS RUBBER RESEARCH PROGRAMMES BALAI PENELITIAN PERKEBUNAN MEDAN 505/D/81