イェイツの劇 : その最近の研究書 : S. B. Bushrui, Yeats's Verse-Plays: The Revisions 1900-1910, Oxford University Press, 1965., 240pp. / David R. Clark, W. B. Yeats and the Theatre of Desolate Reality, The Dolmen Press, 1965., 125pp. / Leonard E. Nathan, The Tragic Drama of William Butler Yeats, Columbia University Press, 1965., 307pp. / Russell K. Alspich, ed., The Variorum Edition of the Plays of W. B. Yeats, London, Macmillan, 1966., 1336pp.(海外新潮)