title: Mortality of ageing people by social groups in the gainfully employed population of Bulgaria, 1965-1966.
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D002031:Bulgaria; D002318:Cardiovascular Diseases / Q000401:mortality; D002493:Central Nervous System Diseases / Q000401:mortality; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009026:Mortality; D009369:Neoplasms / Q000401:mortality; D009790:Occupations; D012140:Respiratory Tract Diseases / Q000401:mortality; D012737:Sex Factors; D012923:Social Class; D012959:Socioeconomic Factors; D013222:State Medicine