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B. M. Barraclough (1972). A medical approach to suicide prevention. Social Science and Medicine 6, 661–671.
T. P. Bridge , S. G. Potkin , W. W. K. Zung & B. J. Soldo (1977). Suicide prevention centers: ecological study of effectiveness. Journal of Nervous and Mental Disease 164, 18–24.
R. Fox (1975). The suicide drop – why? Royal Society of Health Journal 95, 9–14.
D. Lester (1974). Effect of suicide prevention centers on suicide rates in the United States. Health Services Reports 89, 37–39.
P. Sainsbury (1975). Suicide and attempted suicide. In Psychiatrie der Gegenwart (ed. K. P. Kisker , J.-E. Meyer , C. Müller and E. Strömgren ), pp. 557–606. Springer-Verlag: Berlin.