15 utes) Elements of Surface Hardening U.S. Office of Education

Filmography in the catalog

Credited on 1 film (1945) — matched by name in the Creator or Credits field.

Year ▲	Title	Creator	Length	Format	Color	Sound
1945	52 U. S.	tent change at progressive quenchhardening stages; an iron-carbon diagram. Supplementary filmstrip, title, also available. (OE 170; 15 utes) Elements of Surface Hardening U.S. Office of Education		16mm