2680-2688
C. C. Yen, Philip Franklin, E. L. Rees, J. R. Hitt, B. J. Brown, Joseph B. Reynolds, Edwin R. Smith, N. P. Pandya and Frank IrwinVolume:
25
Language:
english
Journal:
The American Mathematical Monthly
DOI:
10.2307/2971969
Date:
March, 1918
File:
PDF, 310 KB
english, 1918