Paul P. Ewald. (1923). Kristalle und Röntgenstrahlen. Naturwissenschaftliche Monographien und Lehrbücher. Berlin: Julius Springer: The handwritten notes found in pp. 106-107. The newspaper clipping found in the very first page of the book.

Jahnke Eugene. (1938). Tables of Functions with Formulae and Curves = Funktionentafeln Mit Formeln Und Kurven. 3. ed. New York: Dover. Include author's inscription. Relevant notes.