Text ( visual ) : unmediated An exploration of speaking proficiency measures in the TOEFL context / John L.D. Clark, Spencer S. Swinton. -- Princeton, N.J. : Educational Testing Service , c1979. -- 69 p. : ill. ; 28 cm. -- (TOEFL research reports ; report 4). -- "October 1979"--Cover ; "RR 79-8." ; Includes bibliographical references (p. 55-56). -- (BA23411788) ; https://ci.nii.ac.jp/ncid/BA23411788 Author Heading(s): Clark, John L. D. ; Swinton, Spencer S.

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