PRINCIPIA MATHEMATICA.
Cambridge University Press. 1950. THREE VOLUMES. Large 8vo. (9.7 x 7.1 inches). Reprint of the second Edition, originally published in 1925 (Volume 1) and 1927 (volumes 2 and 3). ---- Volume 1. xlvi, 674pp. - Volume 2. xxxi, 742pp. - Volume 3. viii, 491pp. Some foxing to the first and..... More