References

1. J. T. Radia: BCIRA Conference, 'Environmental issues affecting greensand plants in US foundries. In Greensand Moulding - The Future', (1991) 26-28
2. International Agency for Research on Cancer (IARC), 'Risk of chemicals to humans $^{\circ}TM$ Silica and some sili-Cates', 42(1987)
3. 素形材 センタ-硏究調査報告 No. 411
4. 素形材 センタ-硏究調査報告 No. 391
5. P.F. Woolrich: American lndustrial Hygiene Association Journal, 'Toxicology, industrial hygiene and medical control of TDl, MDI, PMPPI' 43(1982) 89-97
6. D.A.Bagon and H.L. Hardy:Journal of chromatography, 'Determination of free monomeric toluene diisocyanate (TDI) and 4,4'diisocyanatodiphenylmethane(MDI) in TDl and MDI PrePolymers respectively, by high performance liquid chromatography,' 152(1978)560-564
7. W.G.Palmer:Transactions of the American Foundrymen's Society, 'Analysis of effluents collected from four types of iron casting moulds for use in carcinogenic bioassays', 89(1981)653-658
8. H. Schmittner: Giesserei, 'Occupational health investiga-tions in the cold-box and shell moulding processes', 71(1984)895-902
9. P. P. E. Biggins: Unpublished work at BCIRA
10. S. A. Isherwood: BCIRA Seminar, "Organics adhering to foundry dust, In Improving the foundry environment $^{\circ}TM$ the responsible face of the foundry industry', (1988)
11. J. G. Morley and C. A. Wright: Unpublished work at BCIRA