1. Noise from open cast coal industry sites;Utley;Applied Acoustics,1980
2. Doses of noise received by face workers in underground coal mines;Garcia Ortiz;Inter Noise-93,1993
3. Noise Problem Arising out of Coal Mining Activities and its Abatement;Mukherjee;Report: CMRS (CSIR),1980
4. Indian Standard Specification, Specification for Assessment of Noise Exposure During Work for Hearing Conservation Purposes. IS:7194-1973.