1. Cooper, B.: Statistics from general practice. In: Roots of evaluation. Wing, J.K., Hafner, H. (eds.), pp. 75–86. London: Oxford University Press 1973
2. Dilling, H., Weyerer, S., Enders, I.: Patienten mit psychischen Storungen in der Allgemeinpraxis und ihre psychiatrische Uberweisungsbediirftigkeit. In: Psychiatrische Epidemiologic. Hafner, H. (ed), pp. 135–160. Berlin, Heidelberg, New York: Springer 1978
3. Goldberg, D.P., Cooper, B., Eastwood, M.R., Kedward, H.B., Shepherd, M.: A standardized psychi¬atric interview for use in community surveys. Br. J. Prev. Soc. Med. 24, 18–23 (1970)
4. Logan, W.P.D., Cushion, A.A.: Morbidity statistics from general practice. I. (General) studies on medical and population subjects, No. 14. London: Her Majesty’s Stationary
5. Office 1958 Office of Population Censuses and Surveys: Morbidity statistics from general practice. London: Her Majesty’s Stationary Office 1974