(1982). Prevention of occupational cancer: International symposium : proceedings of the International Symposium on the prevention of occupational cancer, Helsinki, 21-24 April 1981, organised by the Institute of Occupational Health, Helsinki, Finland, in collaboration with the International Labour Office, the World Health Organization and the International Agency for Research on Cancer. Geneva: International Labour Office.

Prevention of Occupational Cancer: International Symposium : Proceedings of the International Symposium On the Prevention of Occupational Cancer, Helsinki, 21-24 April 1981, Organised By the Institute of Occupational Health, Helsinki, Finland, in Collaboration With the International Labour Office, the World Health Organization and the International Agency for Research On Cancer. Geneva: International Labour Office, 1982.

Prevention of Occupational Cancer: International Symposium : Proceedings of the International Symposium On the Prevention of Occupational Cancer, Helsinki, 21-24 April 1981, Organised By the Institute of Occupational Health, Helsinki, Finland, in Collaboration With the International Labour Office, the World Health Organization and the International Agency for Research On Cancer. Geneva: International Labour Office, 1982.