Haldar, S. K. author
Elsevier, 2014
Buku Teks
Winchell, Alexander N., author
John Wiley & Sons, 1937
Buku Teks
Litbang dan energi sumber daya mineral,
Majalah, Jurnal, Buletin
edited by Sybil P. Parker
McGraw-Hill, 1997
Buku Referensi
Hurlbut, Cornelius S., author
John Wiley & Sons, 1977
Buku Teks