This primary source comes from the Records of the Office of Alien Property.
Full Citation: Don't be taken in by Nazi Ballyhoo Pamphlet; ca. 1938; Anti-Nazi Material, Miscellaneous; General Records Seized from the German American Bund, 1944 - 1947; Records of the Office of Alien Property, Record Group 131; National Archives at College Park, College Park, MD. [Online Version, https://www.docsteach.org/documents/document/schmeling-pamphlet, May 6, 2024]