Einsten, Albert & Infeld, Leopold; Physik als Abenteuer der Erkenntnis. Leiden, Sijthoff, 1938. First German edition.
Hardbound 8vo in publisher´s blue cloth with black lettering. Binding a bit soiled and with minor wear to extremities. No dust jacket, as issued. Old name up on title-page. Three plates + illustrations in text. 222 p.