Gaya APA
HARTMANN, D. (1918).
Geological report on the Coal-occurence in the Mining Concessions "SUKAMARINDA" and "BUNIAN" and the Coalfield "AYER SERILLO", Residency palembang. .
Bandung:
Direktorat Batubara.
Gaya MLA
HARTMANN, Dr.E..
"Geological report on the Coal-occurence in the Mining Concessions "SUKAMARINDA" and "BUNIAN" and the Coalfield "AYER SERILLO", Residency palembang.".
Bandung:
Direktorat Batubara,
1918.
Batubara.