1. TLVs: Threshold limit values for chemical substances and physical agents in the workroom environment with intended changes for 1986;ACGIH,1987
2. Heating and cooling for man in industry;AIHA,1975
3. Heat stress in occupational work;Astrand;AMBIO,1975
4. Environmental warmth and its measurement;Bedford,1946
5. The search for a universal heat stress index;Belding,1970