Text ( visual ) : unmediated Workbook in second language acquisition / Larry Selinker, Susan Gass. -- : pbk. -- Rowley, Mass. : Newbury House Publishers , 1984. -- vi, 186 p. : ill. ; 29 cm. -- Includes bibliographical references and index. -- ISBN 0883774356 ; (BA01249110) ; https://ci.nii.ac.jp/ncid/BA01249110 Author Heading(s): Selinker, Larry ; Gass, Susan M.. -- Classification(s): LCC : P118 ; DC19 : 418/.007. -- Subject Heading(s): LCSH : Second language acquisition ; LCSH : Language and languages -- Study and teaching