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Niles, Donald E. (ed.) / The Wisconsin engineer
Volume 48, Number 7 (March 1944)

Graham, Walt
Mathematical morsels,   pp. 12-21


Page 12


I . _d Af*
dgo%    - --.. '..&
Iff                    vff"J: A      v mv _ _  g
                       BELL TELEPHONE SYSTEM
             War calls keep Long Distance lines usy.. . That's why your call
may be delayed.
THE WISCONSIN ENGINEER
13
'A
I


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