Text ( visual ) : unmediated Social disadvantage and educational opportunity / R. K. Kelsall, Helen M. Kelsall. -- London ; New York : Holt, Rinehart and Winston , c1971. -- [5], 217 p. ; 21 cm. -- (Technology and the humanities series). -- Bibliography: p. [209]-210 ; Includes indexes. -- ISBN 0039101223 ; (BA11311196) ; https://ci.nii.ac.jp/ncid/BA11311196 Author Heading(s): Kelsall, R. Keith (Roger Keith) ; Kelsall, Helen M.. -- Classification(s): LCC : LC203 ; DC : 371.9/67. -- Subject Heading(s): LCSH : Socially handicapped children

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