![](/img/cover-not-exists.png)
3315-3318
Langman, Harry, Campbell, Wm. B., Gibson, Emma M., Mills, C. N.Volume:
35
Language:
english
Journal:
The American Mathematical Monthly
DOI:
10.2307/2300017
Date:
April, 1928
File:
PDF, 289 KB
english, 1928