====== Unpublished material held elsewhere ======

[[http://www.zbp.univie.ac.at|ZENTRALBIBLIOTHEK DER PHYSIKALISCHEN INSTITUTE]], Universität, Vienna, Austria. See description in Chapter IV, prefatory to microfilms No. [[http://quantum-history.mpiwg-berlin.mpg.de/intranet/sourcesIntranet/ahqp/037|37]], [[http://quantum-history.mpiwg-berlin.mpg.de/intranet/sourcesIntranet/ahqp/039|39]]-[[http://quantum-history.mpiwg-berlin.mpg.de/intranet/sourcesIntranet/ahqp/044|44]], and [[http://quantum-history.mpiwg-berlin.mpg.de/intranet/sourcesIntranet/ahqp/046|46]].\\ 
[[http://archon.nbi.dk/|BOHR COLLECTION, Copenhagen, Denmark.]] Letters to Bohr, [[http://quantum-history.mpiwg-berlin.mpg.de/quantumViewer?mode=texttool&url=/permanent/echo/quantum_project/es_alpbach/006_Korrespondenz/006_001-003/index.meta|24 May 24]], 21 Sep 26, 27 Sep 26, 28 Sep 26, [[http://quantum-history.mpiwg-berlin.mpg.de/quantumViewer?mode=texttool&url=/permanent/echo/quantum_project/es_alpbach/006_Korrespondenz/006_001-004/index.meta|23 Oct 26]], 25 Nov 26, 5 May 28, 18 Jan 29, 25 Sep 30, [25 Apr] 31, [1931], 29 Apr 31, 29 Sep 32, 5 letters 1944-52. See: Bohr.\\ 
[[http://www.bedford.ac.uk/student_support_and_finance/learning_resources.aspx|BEDFORD COLLEGE LIBRARY]], University of London, London, England. Letters to W. Wilson, 4 Nov 35, 3 letters 1950-52, 1 letter [undated].\\ 
[[http://www.dias.ie|DUBLIN INSTITUTE FOR ADVANCED STUDIES]], Dublin, Ireland. See description in Chapter IV, prefatory to microfilms No.[[http://quantum-history.mpiwg-berlin.mpg.de/intranet/sourcesIntranet/ahqp/037|37]], [[http://quantum-history.mpiwg-berlin.mpg.de/intranet/sourcesIntranet/ahqp/039|39]]-[[http://quantum-history.mpiwg-berlin.mpg.de/intranet/sourcesIntranet/ahqp/044|44]], and [[http://quantum-history.mpiwg-berlin.mpg.de/intranet/sourcesIntranet/ahqp/046|46]].\\ 
[[http://www.museumboerhaave.nl|RIJKSMUSEUM VOOR DE GESCHIEDENIS DER NATUURWETENSCHAPPEN]], Leiden. The Netherlands. 9 letters to Ehrenfest with copies of answers, 1920-33.\\ 
[[http://www.svenskaakademien.se/web/The_Nobel_Library.aspx|LIBRARY OF THE SWEDISH ACADEMY]], Stockholm, Sweden. Letter to Oseen, 15 Feb 37, .1 letter [undated].\\ 
[[http://library.web.cern.ch/library/archives/pauli/pauliletter.html|PAULI COLLECTION]], Zurich, Switzerland. Letters to Pauli, 12 Jul 20, 13 Feb 21, 7 Nov 21, 8 Nov 22, [[http://quantum-history.mpiwg-berlin.mpg.de/quantumViewer?mode=texttool&url=/permanent/echo/quantum_project/ahqp/041/041_010-005/index.meta|15 Dec 26]], 4 letters 1940-57. See: Pauli.\\ 
[[http://www.ethz.ch/libraries/index|BIBLIOTHEK DER EIDGENÖSSISCHEN TECHNISCHEN HOCHSCHULE]], Zurich, Switzerland. Letters to Weyl, 6 Nov 29, 11 Dec 29, 1 Apr 31, 8 Mar 35, 8 letters 1941-47, 1 letter [undated]. See: Weyl. Lecture, "Atomenergie." Manuscript, 13 pp., Dublin, 10 Jul 54.\\ 
[[http://huntington.org/burndy.htm|BURNDY LIBRARY]], Norwalk, Conn. Manuscript in Weiner Collection.\\ 
[[http://diglib.princeton.edu/ead/getEad?eadid=C1022&kw=|EINSTEIN COLLECTION]], Princeton, N.J. Correspondence with Einstein, 22 items 1925-39, 32 items 1943-47, c. 32 items 1950-54.\\ 
[[http://library.duke.edu/uarchives/|DUKE UNIVERSITY ARCHIVES]], Durham, N.C. Letters to London, 17 Nov 31, 9 Jun 32, 2 letters 1939. See: London.