Engineering; Heat Treatment Of Steel.

Copyright

Complete catalog record
ENGINEERING; heat treatment of steel. Audio Productions, Inc., c1945. 1 reel each. © Audio Productions, Inc. 1. Elements of Hardening. © 1Jun45; MP16181. 2. Elements of Tempering, Normalizing and Annealing. © 1Jun45; MP16182. 3. Elements of Surface Hardening. © 1Jun45; MP16183.

Sources

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