Erpi, Twyman, VES (sale)

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Filmography in the catalog

Credited on 1 film (1933) — matched by name in the Creator or Credits field.

Year ▲	Title	Creator	Length	Format	Color	Sound
1933	Sound Waves and Their Sources (Univ. of Chicago Physical Science Series)	Akin and Bagshaw; American Museum of Natural History; University of Arizona; Bell and Howell; Brigham Young; University of California; College Film Center; University of Colorado; Edited Pictures System; University of Georgia; University of Iowa; Iowa State College; University of Illinois; Indiana University; University of Kansas; University of Kentucky; Millersville; University of Minnesota; University of Missouri; University of North Carolina; University of New Hampshire; University of Oklahoma; Pennsylvania College for Women; University of South Carolina; University of Texas; Visual Education Service; Central Washington College of Education; University of Wisconsin (rental); Erpi, Twyman, VES (sale)	11 min	16mm		Sound