Artikel Jurnal
Wahyuningsih Herbowo, author
2010
UI - Tesis (Open)
I Made Sandy, author
Yayasan Dwidjendra, 1976
Buku Referensi
Dep. Energi dan Sumber Daya Mineral, 2003
Buku Referensi
Batubara, Marwan, author
[publisher not identified], 2009
Buku Teks