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Bartók, Béla to Nicholas Murray Butler, 12 April 1940
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Bartók, Béla to Nicholas Murray Butler, 2 May 1940
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Moore, Douglas to Frank Fackenthal, 14 June 1940
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Bartók, Béla to Frank Fackenthal, 30 October 1940
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Bartók, Béla to Frank Fackenthal, 16 November 1940
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Bartók, Béla to Philip M. Hayden, 6 February 1941
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Bartók, Béla to Frank Fackenthal, 20 March 1941
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Moore, Douglas to Frank Fackenthal, 22 April 1941
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Bartók, Béla to Douglas Moore, 18 April 1941
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Bartók, Béla to Philip M. Hayden, 11 May 1941
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Bartók, Béla to Douglas Moore, 21 January 1942
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Halifax, Edward Frederick Lindley Wood, Earl of, to Frank Fackenthal, 6 March 1942
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Bartók, Béla to Frank Fackenthal, 13 March 1942
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Lang, Paul H., 18 March 1942
Nomination for the appointment of Bartók, Béla as Associate in Music
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Bartók, Béla to Philip M. Hayden, 8 April 1942
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Bartók, Béla to Philip M. Hayden, 20 October 1943