The Cambridge companion to W.B. Yeats
Marjorie Howes, John Kelly, editor
Cambridge University Press, 2008
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Jeffares, A. Norman
A commentary on the collected poems of W.B. Yeats
Stanford University Press, 1968
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MacNeice, Louis
The poetry of W.B. Yeats / Louis MacNeice.
Oxford University Press, 1941
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Shannon, George W. B.
Unlived affections / George W.B. Shannon.
Harper &​ Row , 1989
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Yeats : poems, 1919-1935 : a casebook / edited, Elizabeth Cullingford
Macmillan, 1984
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