[A study on the mental hygiene states of the aged--comparative surveys in a big city, a moutain village and an asylum for the aged].
D000368:Aged; D004777:Environment; D005260:Female; D006306:Health Surveys; D006707:Homes for the Aged; D006801:Humans; D008297:Male; D008603:Mental Health; D012424:Rural Population; D014505:Urban Population