Berlin, Germany: Julius Springer, 1927. Hardcover. First Edition. viii, 911 pp. 8vo. Black cloth spine with marbled paper covers. Some scuffing overall with a clean interior. Previous owner's name in ink on first free endpaper. Very Good.
Max Born's (1882-1970) third and most complete paper on his probabilistic interpretation of Erwin Schrödinger's wave equation.