na INLIS000000000057866 20221201030702 0010-1222000014 ta 221201 g 1 ind 678.4 678.4 MUL r MULLINS, LEONARD Requirements in the manufacture of products from natural and synthetic rubbers / Leonard Mullins Jakarta : Konperensi Karet Nasional, 1976 20 p. : ill. ; 30 cm. RUBBER MANUFACTURE 248/D/77