1. Muller Associates Inc. (1988). Syseen Corporation, Brookhaven National Laboratory, Handbook of Radon in Buildings: Detection, Safety and Control: Hemisphere Publishing Corporation.
2. Barnet, I. (2012). Indoor Radon probability calculated from the Czech soil gas Radon data in a grid net for the European Geogenic Radon Map construction: test of feasibility. Environ. Earth Sci. 66, 1149 - 1153.
3. Ulomov, V.I. and Mavashev, B.Z. (1967). A Precursor of a strong tectonic earthquake. Acad. Sci. USSR Earth Sci. Sect. 176, 9 - 11.
4. Bhadwal, R., Thakur, N. and Kumar J. (2015). Health Risk Assessment Based on Radioactivity Measurement in Soil Samples Collected from Some Areas of Mandi District in Himachal Pradesh’, CPU Hamirpur Res. J. 1, 14 - 18.
5. Bhadwal, R., Thakur, N. and Kumar J. (2015). Radioactivity Measurements along Jwalamukhi Thrust in Himachal Pradesh, India, CPU Hamirpur Res. J. 1, 23 - 27.
6. Bhadwal, R., Thakur, N. Kumar, J., Kumar, G. and Sharma, Y. (2017). Soil-gas Radon monitoring in Hamirpur District of Himachal Pradesh, NW- Himalaya, India. CPU Hamirpur Res. J. 2, 152 - 155.
7. Kumar, A., Arora, V., Walia, V., Bajwa, B.S. Singh, S. and Yang, T.F. (2014). Study of soil gas Radon variations in the tectonically active Dharamshala and Chamba regions, Himachal Pradesh, India, Environ. Earth. Sci. 72, 2837 - 2847.
8. Wu, Q., Pan, Z., Liu, S. and Wang, C. (2016). Outdoor Radon concentration in China. Nukleonika, 61, 373 - 378.
9. AlTamimi, M.H. and Abumurad, K.M. (2001). Radon anomalies along faults in North of Jordan, Radiat. Meas. 34, 397 - 400.
10. Singh, S., Kumar, A., Bajwa, B. S., Mahajan, S., Kumar, V. and Dhar, S. (2010). Radon Monitoring in Soil Gas and Ground Water for Earthquake Prediction Studies in North West Himalayas, India, Terr. Atmos. Ocean. Sci. 21, 685 - 695.
11. Duggal, V., Rani, A. and Mehra, R. (2014). Measurement of soil-gas Radon in some areas of northern Rajasthan, India, J. Earth Syst. Sci. 123, 1241 - 1247.
12. Nagaraja, K. and Sathish, L.A. (2010). Outdoor Radon Exposure and Doses in Pune, India, Int. J. Phys Appl. 2, 69 - 72.
13. Kumar, A., Walia, V., Singh, S., Bajwa, B.S., Mahajan, S., Dhar, S. and Yang, T.F. (2013). Earthquake precursory studies at Amritsar, Punjab, India using Radon measurement techniques, Phys Sci. 7, 5669 - 5677.
14. Kumar, G., Kumar, A., Walia, V., Kumar, J., Gupta, V., Yang, T.F., Singh, S. and Bajwa B.S. (2013). Soil gas Radon -Thoron monitoring in Dharamshala area of North-West Himalayas, India using solid state nuclear track detectors, Earth Syst. Sci. 122, 1295 - 1301.
15. Eappen, K.P. and Mayya, Y.S. (2004). Calibration factors for LR-115 (Type-II) based Radon Thoron discriminating dosimeter, Radiat. Meas. 38, 5 - 17.
16. Morgan, R.P.C (2005). Soil erosion and conservation 3rdedn, Blackwell publishing Ltd.USA.