The basic raw material for this study is from the records of the German Foreign Ministry, the German Army (Heer) High Command, and the German Supreme Command (Wehrmacht) now preserved in the microfilmed Captured German Records at the U. S. National Archives and Records Administration in Washington, D. C. Special mention is necessary of the guides to this material. Among these the most indispensable are George O. Kent's A Catalog of Files and Microfilms of the German Foreign Ministry Archives, 4 vols. (Stanford, Conn.: Hoover Institute, 1966), and the National Archives's own Guides to the German Records Microfilmed at Alexandria, Virginia. Of the latter, the following were the most pertinent for research on the German military attache in Washington: Records of Headquarters, German Army High Comnand (Numbers 12, 29, and 30), and Records of Headquarters, German Armed Forces High Command (Numbers 7, 17, 18, and 19). Also of value in uncovering material on von Boet-ticher's work at Geneva from 1926 to 1929 was Hans Aufricht's Guide to League of Nations Publications; A Bibliographical Survey of the Work of the League, 1920-1947 (New York: AMS Press, 1966). The published Documents on German Foreign Policy, Series C and D, were useful not only for their selection of English translations of German documents, but also for their inclusion of lists of original German Foreign Office serial files and descriptions of their contents. The microfilmed record of these original files has retained the German serial designations to show the provenance of the material. Following the German serial designation and separated from it by a shil (/) is the American National Archives microfilm roll number. The documentary citations throughout this study thus include both American and British microfilm information and the cross-referenced German serial designations. The following list repeats this information to facilitate the replication of research.
World History
