ANIL KUMAR1, INDU SINGH1, V.K. BHATT 1 AND R. SINGH2, R. R. A Comparative Study of Environmental Indoor Radon and Thoron in Shahjahanpur and Hardoi District of Central Uttar Pradesh. Recent Research in Science and Technology, [S. l.], v. 3, n. 6, 2011. Disponível em: https://www.updatepublishing.com/journal/index.php/rrst/article/view/709. Acesso em: 14 oct. 2025.