1. Die indirekten kosten eines Betriebsunfalls;Berckhoff;Die Berufagenossenschaft,1952
2. Effects of noise reduction in a work situation;Broadbent;Occup. Psychol.,1960
3. Chapanis, A., 1965. Man–Machine Engineering, Tavistock Publications Ltd., London.
4. Air fed clothing for work in hot conditions;Crockford;Ind. Safety,1962
5. New developments in heat protective clothing for industry;Crockford;Trans. Assoc. Ind. Med. Off.,1963