Text ( visual ) : unmediated A social problem group? / edited by C.P. Blacker. -- London : Oxford University Press , 1937. -- vi, 228 p. : diagrs ; 23 cm. -- "References" at end of most of the chapters. -- (BA7396258X) ; https://ci.nii.ac.jp/ncid/BA7396258X Author Heading(s): Blacker, C. P. (Charles Paton). -- Classification(s): LCC : HV33 ; DC : 301.15. -- Subject Heading(s): LCSH : People with disabilities ; LCSH : People with mental disabilities ; LCSH : Great Britain -- Social conditions