Radon-thoron exhalation rates in mineral-enriched beach sand of the Chennai coast, India. - John Samson M; Manikanda Bharath K; Vidyasakar A; Ajith Kumar K; Arun Bharathi V; Bramha S; Chandrasekaran S; Neelavannan K; Gopal V; Ajith Kumar S; Sivakumar N (Environmental geochemistry and health, 2026)