‎"HEISENBERG, WERNER.‎
‎Die Grenzen der Anwendbarkeit der bisherigen Quantentheorie.‎

‎Berlin, Springer, 1941, 8vo. In contemporary halv cloth with gilt lettering to spine. In ""Zeitschrift für Physik"", Bd. 117, 1941. Entire volume offered. Stamp to front free end-paper. Fine and clean. Pp. 251-266. [Entire volume: VIII, 818 pp.].‎

Reference : 49302

‎First appearance of Heisenberg's important paper in which ""succeded in sketching invariant procedures for establishing such a theory [n new relativistic invariant theory quantum theory in which the fundamental length laid down the limitations of present quantum theory in the same way as the constants c and h fixed the limitations fo classical physics] by developing a formalism of time displacement in the interaction picture (which later became standard in quantum mechanics)"". (March, Werner Heisenberg, and the search for a smallest length)Cassidy 1938b‎