How many movies have Frank Ellis and George H. Plympton collaborated on?

They have worked on 20 movies together! Their first movie together was Gordon of Ghost City (1933) while their highest rated movie together was The Oregon Trail (1939). They have not worked together since Son of Geronimo (1952). They are most known for their western films together.

Role
Jed Hardy (ch 1) (uncredited)
Crew
Story
Crew
Screenplay
Role
Hendrickson [Chs. 1-2, 4, 8-9]
Crew
Writer