Text ( visual ) : unmediated Research methods and the new media / Frederick Williams, Ronald E. Rice, Everett M. Rogers. -- New York : Free Press ; London : Collier Macmillan , c1988. -- xii, 212 p. : ill. ; 25 cm. -- (Series in communication technology and society). -- Bibliography: p. 193-206 ; Includes index. -- ISBN 0029353327 ; (BA09834001) ; https://ci.nii.ac.jp/ncid/BA09834001 Author Heading(s): Williams, Frederick ; Rice, Ronald E. ; Rogers, Everett M.. -- Classification(s): LCC : P91.3 ; DC19 : 001.51/072. -- Subject Heading(s): LCSH : Mass media -- Research -- Methodology ; LCSH : Mass media -- Technological innovations