Hihn-Younger Archive, Special Collections, University Library, University of California at Santa Cruz.Created By: UC Santa Cruz
John Jacob Astor: Business ManCreated By: Kenneth W. Porter Publisher: New York, NY: Russell & Russell, 1931
John Jacob Astor: Der erfolgreichste deutsche AuswandererCreated By: Alexander Emmerich Publisher: Stuttgart: Konrad-Theiss-Verlag, 2009
