Text ( visual ) : unmediated The health of older people : a social survey / Ethel Shanas. -- Cambridge, Mass. : Harvard University Press ; London : Oxford University Press , 1962. -- 250 p. : ill. ; 27 cm. -- Includes index. -- (BA29225323) ; https://ci.nii.ac.jp/ncid/BA29225323 Author Heading(s): Shanas, Ethel. -- Classification(s): DC18 : 362.61045