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Authors: Ehlers, P.J.; Porter, T.; Williams, A.F.; Wells, J.K.; Ferguson, S.A.
Source: Journal of Safety Research, Volume 28, Number 2, Summer 1997, pp. 69-73(5)
Document Type: Research Article
Affiliations: School of Mathematics, University College of North Wales, Dean Street, Bangor, Gwynedd, LL57 1UT, UK
Publication date: June 1, 1997