1. Relation between soil–gas radon variation and different lithological units, Garhwal Himalaya, India;Choubey;Appl. Radiat. Isot,1999
2. Protection against radon-222 at home and at work;ICRP,1993
3. On the effect of atmospheric pressure variations on the radon-222 concentration in unventilated rooms;Jonassen;Health Phys,1975
4. Year to year variations in annual average indoor radon concentrations;Martz;Health Phys,1991
5. Uranium occurrence close to main central thrust around Sileth, Dhargaon, Chamyala Balganga valley, Tehri Garhwal (U.P.);Nashine;Him. Geol,1982