1. Directorate general of mines safety annual report;Government of India, Ministry of Labour & Employment,2005
2. Directorate general of mines safety annual report;Government of India Ministry of Labour & Employment,2009
3. Directorate general of mines safety annual report;Government of India Ministry of Labour & Employment,2010
4. Directorate general of mines safety annual report;Government of India Ministry of Labour & Employment,2012
5. Directorate general of mines safety annual report;Government of India Ministry of Labour & Employment,2013