Engineering.

Copyright

Complete catalog record
ENGINEERING. Audio Productions, Inc., for the U. S. Office of Education, c1944. 1 reel each, sd., 16mm. © Audio Productions, Inc. X-Ray Inspection. © 1Apr44; MP14678. Measurement with Light Waves. © 5May44; MP14873.

Sources

  1. 16mm Filmography (legacy record) — title, year, length, format, sound, catalog record, copyright