na INLIS000000000008090 20130612100012 Ind 010-061300000008090 Ind 604.6 604.6, Sai p Said, Gumbira Penanganan dan pemanfaatan limbah keapa sawit, Gumbira said 1996 Ungaran ix, 106 hlm, ilus, 21 cm Limbah Pabrik