Some social and hygienic aspects of cancer mortality.
D003604:Czechoslovakia; D005060:Europe; D005770:Gastrointestinal Neoplasms / Q000453:epidemiology; D008175:Lung Neoplasms / Q000401:mortality*; D009369:Neoplasms / Q000453:epidemiology / Q000401:mortality*; D012142:Respiratory Tract Neoplasms / Q000453:epidemiology