1. Emission Regulations (December 1985), Part-3, CPCB, Delhi
2. Guidelines for Continuous Emission Monitoring Systems, CPCB, Delhi, June, 2018, Revision-01
3. Guidelines for Measurement of Ambient Air Pollutants, Vol-I, CPCB-2012–2013
4. Guidelines on methodologies for source emission monitoring, CPCB, Delhi, 2013–2014
5. IS 13270:1992, Indian standard test for gases by Orsat and gas chromatographic methods, Bureau of Indian Standards, New Delhi, 1992