A scan of this advertisement is located at the University of Oregon's Historic Oregon Newspaper site:
https://oregonnews.uoregon.edu/lccn/sn83025138/1912-10-11/ed-1/seq-16/
.
Moringing Oregonian
, October 11, 1912, page 13:
United States Early Radio History
>
News and Entertainment by Telephone
>
Telephone Herald Companies