4 1 20 Syafrimeizal Primary Author Efendi, Chaerul Primary Author Rachim, Taufik Primary Author Kusuma, Hardjana Primary Author Slamet, JB. Primary Author Derlia Primary Author Sunardi, Edi Primary Author mixed material Jakarta Antam 1998 C-2018090790.jpg.jpg Efendi, Chaerul Primary Author mixed material Bogor Antam – Unit Geologi 1986 An Internal Report Volume II Efendi, Chaerul Primary Author Mu'min, Gaga Primawan Primary Author mixed material Bogor BHP-Utah Pasific Inc 1989 An Internal Report Volume I Efendi, Chaerul Primary Author Mu'min, Gaga Primawan Primary Author mixed material Bogor BHP-Utah Pasific Inc 1989