Klaus Stopp. Birth and Baptismal Certificate. 1818. Klaus Stopp Collection, #908.
Bluhm, Heinz. “The Newberry Library ‘Goetheana’: A Preliminary Report on the Chicago Find.” The Newberry Library Bulletin 5.5 (1960): 173-185. Call number: Z 79.N 4112 and photocopy in checklist area.
Hawgood, John A. “A German-American Library of the Wilhelminische Zeit.” The Newberry Library Bulletin 4.7 (1957): 211-221. Call number: Z 79.N 4112 and photocopy in checklist area.
Wilson, Bernard E. “German Literature at the Newberry Library.” Report to the Bibliographical Committee. Unpublished, 1970. Call number: photocopy in the Guide to the Collections, shelved in Reference.