[Menasha, Wis., and Providence, R. I.]: [American Mathematical Society] February 1950. 90-93 pages. 10 x 7 1/8 inches. Publisher's original printed blue wrappers. Stapled. Near Fine. Wraps.

The American Mathematical Monthly first published this article in Vol 57, (Feb. 1950), pp 90-93. We offer here the original offprint issue..... More