The SciencesSeptember 30, 1911
Problems in Telephone Traffic Enǵineerinǵ.—II
Some of the Difficulties that Arise in Serving a Heterogeneous Territory
Stories by F. P. Valentine
The SciencesSeptember 23, 1911
Problems in Telephone Traffic Enǵineerinǵ—I
Some of the Difficulties that Arise in Serving a Heterogeneous Territory