SAFEGUARDING THE SPEECHWAYS
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Shows the manufacture of various types of wire used in the telephone system. Starts with the collection of the raw materials, following them through to the uses of the finished product.
Complete catalog record
Dewey number: 621.385
Audience level: sh-c-trade
Format/cost: 16-sd-loan
Distributors / rental: Ko; State Department of Education, Virginia; University of Missouri 50c; National Council of Young Men's Christian Associations loan
Audience level: sh-c-trade
Format/cost: 16-sd-loan
Distributors / rental: Ko; State Department of Education, Virginia; University of Missouri 50c; National Council of Young Men's Christian Associations loan
Sources
- Educational Film Guide 1946 — title, year, creator, length, format, sound, description, catalog record
- Index of Training Films 1946 — title, creator, length, format, description, catalog record
Record added 2026-07-02 14:20:00