Principia mathematica, by Alfred North Whitehead ... and Bertrand Russell.
Author: Whitehead, Alfred North, 1861-1947.
The University of Michigan Library provides access to these materials for educational and research purposes. These materials are in the public domain in the United States. If you have questions about the collection, please contact Historical Mathematics Digital Collection Help at firstname.lastname@example.org. If you have concerns about the inclusion of an item in this collection, please contact Library Information Technology at email@example.com.