75/2209 Dirac, P.A.M. Die Prinzipien der Quantenmechanik. German transl. by W. Bloch. Leipsic, S. Hirzel, 1930, 1st German ed., XI,(1),274,(2 advert)p., orig. giltlettered cl.

- Sm. bookseller's ticket on upper pastedown. Cloth sl. rubbed at spine-ends.