LOCATION SYMBOLS Unless otherwise specified, all documents presented or cited in this volume, as well as books cited from Einstein's personal library or items from his col- lection of musical scores, are located in original in the Albert Einstein Archives at the Hebrew University of Jerusalem. The following is a list of other repositories cited: AVSa Österreichisches Staatsarchiv, Allgemeines Verwaltungsarchiv, Vienna, Austria AVU Archiv der Universität Wien, Vienna, Austria AVVGdA Verein für die Geschichte der Arbeiterbewegung, Vienna, Austria BBU Universite libre de Bruxelles, Brussels, Belgium CBU University of California, Berkeley, USA CLE Einstein Family Correspondence Trust, Los Angeles, USA CPIT California Institute of Technology, Pasadena, USA CSmH The Huntington Library, San Marino, USA Cz Närodnm Knihovna, Prague, Czech Republic Cz-Ar Stätnx TJstfedni Archiv, Prague, Czech Republic CzPCU Archiv Univerzity Karlovy, Prague, Czech Republic DNM National Museum of American History, Washington, D.C., USA DS Smithsonian Libraries, Washington, D.C., U.S.A. FPBN Bibliotheque Nationale, Paris, France GyAaSt Standesamt Aachen, Germany GyAaTH Hochschularchiv, Rheinisch-Westfälische Technische Hochschule, Aachen, Germany GyB Staatsbibliothek zu Berlin, Preußischer Kulturbesitz, Berlin, Germany GyBAW Archiv der ehemaligen Akademie der Wissenschaften, Berlin, Germany