1. Office of Population Censuses and Surveys, Classification of occupations, H.M.S.O, London (190).
2. Individual matching with multiple controls in the case of all or none responses;Meittinen;Biometrics,1969
3. Note on the sampling of the differences between connected proportions or percentages;McNemar;Psychometrika,1947
4. Tumors of the urinary bladder. an analysis of the occupations of 1030 patients in Leeds, England;Anthony;J Nat Cancer Inst,1970
5. Two epidemiological inquiries into the incidence of bladder tumors in industrial workers;Veys;J Nat Cancer Inst,1969