The confusability of international telephone service tones
By: by G. P. Kidd.
Series: Commonwealth of Australia. Postmaster-General's Dept. Engineering Planning and Research Division. Research laboratory report,; no. 6292
Publisher: Planning and Research Division, Postmaster-General's Dept.
Published: 1968
Place of publication: Melbourne
Language: eng
Subjects: Telephone.; Human engineering.
Notes: Bibliography: p. 9.
Cover title.