Semi-vektoren und Spinoren. Offprint
1932. Offprint from Sitzungsberichte der Preussischen Akademie der Wissenschaften 32 (1932). 31pp. 256 x 183 mm. Original printed wrappers, a little chipped and darkened, small splits in spine. Very good. First edition, offprint issue. Einstein's work on semivectors "was stimulated by Ehrenfest's insistence on a better understanding of the relation..... More