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W. H. Burgdorf, A. Scholz: Helen Ollendorff Curth and William Curth: from Breslau and Berlin to Bar Harbor. In: Journal of the American Academy of Dermatology. Bd. 51, Nr. 1, Juli 2004, S. 84–89, doi:10.1016/j.jaad.2003.12.035, PMID 15243529.