References in Real Estate

Hihn-Younger Archive. Special Collections, University Library, University of California at Santa Cruz. Digital Collections.

Schieffelin Family Papers. Yale Collection of Western Americana, Beinecke Rare Book and Manuscript Library. Finding aid.

Schieffelin Family Papers, 1756-1907. Manuscripts and Archives Division, The New York Public Library, Astor, Lenox and Tilden Foundations. Finding aid.

Emmerich, Alexander. John Jacob Astor: Der erfolgreichste deutsche Auswanderer. Stuttgart: Konrad-Theiss-Verlag, 2009.

Porter, Kenneth W. John Jacob Astor: Business Man. New York, NY: Russell & Russell, 1931.