1. Agarwal NC, Kumar G (1973) Geology of upper Bhagirathi and Yamuna valleys, Uttarkashi Distt. Kumaun Himalaya. Him Geol 3:1?23
2. Ball TK, Cameron DG, Colman TB, Robert PD (1991) Behaviour of radon in the geological environment: a review. Q J Eng Geol Lond 24:169?182
3. Bartarya SK, Virdi NS, Sah MP (1996) Landslide Hazards: Some case studies from the Satluj valley, Himachal Pradesh. J Him Geol 17:193?207
4. Choubey VM (1998) Radon measurements in soil and water and its relation with geology, Garhwal Himalaya. In: Katase A, Shimo M (eds) Preceeding volume of 7th Tohwa international symposium ?Radon and Thoron in the Human Environment? held at Fukuoka, Japan October 1997. World Scientific Publ, Singapore, pp 193?198
5. Choubey VM, Bist KS, Saini NK, Ramola RC (1999) Relation between soil-gas radon variation and the different lithotectonic units of Garhwal Himalaya, India. J Appl Radiat Isot 51(5):587?592