Milestones of communication progress
By: by H.T. Kohlhaas ...
Publisher: International telephone and telegraph corporation
Published: 1942
Place of publication: New York
Language: eng
Number of pages: 45
Subjects: Radio; History; Telephone
Other titles: International telephone and telegraph corporation.
Notes: At head of title: An IT & T contribution.

"Reprinted from Electrical communication. vol. 20, no. 3, 1942."

"References": p. 41-45.