Text ( visual ) : unmediated Applying educational research : a practical guide / Walter R. Borg, Joyce P. Gall, Meredith D. Gall. -- 3rd ed. -- New York : Longman , c1993. -- xvii, 443 p. : ill. ; 25 cm. -- Includes bibliographical references (p. 408-410) and indexes. -- ISBN 0801304865 ; (BA2642196X) ; https://ci.nii.ac.jp/ncid/BA2642196X Author Heading(s): Borg, Walter R. ; Gall, Joyce P. ; Gall, Meredith D.. -- Classification(s): LCC : LB1028 ; DC20 : 370/.78. -- Subject Heading(s): LCSH : Education -- Research -- Handbooks, manuals, etc

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