na YOGYA-02110000006529 20110210124117863 ind 979-420-359-9 010-021100000006529 549 SUKANDARRUMIDI Batubara dan gambut Cet. 1 Yogyakarta Gajah Mada University Press 1995 xiv, 150 hlm.;ilus.;21 cm. Tambang batubara YOPDYOG[B] 99P0001765 99P0001766 1766-P/99 1765-P/99 1767-P/99