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1
| Minerals Yearbook vol.1: Metals and Minerals 2003 | | 2005 |
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2
| Coal Mine Directory: United States and Canada 2004 | Coal Age | 2004 |
|
3
| Handbook on Minerals & Mines in India 2004 | India Book Centre | 2004 |
|
4
| U.S. Geological Survey(USGS) Minerals Yearbook vol.1 | United States Government Printing Office | 2004 |
|
5
| 2003 Coal Mine Directory: United States and Canada | Keystone Coal Industry Manual and Coal Age | 2003 |
|
6
| The Australian Mines Handbook 2003-2004 | | 2003 |
|
7
| Coal Mine Directory: United States and Canada 2002 | Keystone Coal Industry Manual and Coal Age | 2002 |
|
8
| Minerals Yearbook: Metals and Minerals 2000 v.1 | U.S. Geological Survey (USGS) | 2002 |
|
9
| Register of Indo-Pacific Mining 2002 | | 2002 |
|
10
| Base Metals Handbook | Woodhead Publishing Limited | 2001 |