Case studies on heat stress related perceptions in different industrial sectors in southern India oleh Kalpana Balakrishnan, Ayyappan Ramalingam, Venkatesan Dasu, Jeremiah Chinnadurai Stephen, Mohan Raj Sivaperumal, Deepan Kumarasamy, Krishnendu Mukhopadhyay, Santu Ghosh, Sankar Sambandam