Educational research : an introduction / Walter R. Borg, Meredith Damien Gall
Main AuthorBorg, Walter R.CoauthorGall, Meredith DamienCountryEstados Unidos.Edition4nd edPublicationNew York : Longman, cop. 1983DescriptionXXXIII, 936 p. ;
24 cmISBN0-582-28246-2 CDU37.012
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