IARS SCIENTIFIC PUBLICATIONS no.12 526,678 Screening testa in chemical carcinogenesis. Proceedings of a workshop organized by IARC and the Commission of the European Communities and held in Brussels,Belgium,9-12 June 1975. Ed. R.Montesano, H.Bartsch,L.Tomatis. Lyon 1976 IARC 8° s. XX, 666, il. Commission of the European Communities Directorate General for Research Science and Education. International Agency for Research on Cancer WHO Scientific Publ.Jfo. 12