Text ( visual ) : unmediated Media research : aspects of method / prepared for the course team by Paul Hartmannn. -- Milton Keynes : Open University Press , c1987. -- 27 p. : ill. ; 30 cm. -- (Communication and education ; block 6 . Communication, media and society ; unit 21). -- ISBN 0335133711 ; (BA11413276) ; https://ci.nii.ac.jp/ncid/BA11413276 Author Heading(s): Hartmann, Paul

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