How many movies have Kenne Duncan and Norman S. Hall collaborated on?

They have worked on 20 movies together! Their first movie together was Flash Gordon's Trip to Mars (1938) while their highest rated movie together was Adventures of Captain Marvel (1941). They have not worked together since Pack Train (1953). They are most known for their western films together.

Role
Ross McLain
Crew
Screenplay
Crew
Story
Role
Arthur Wilkes - Secretary
Crew
Screenplay
Role
R. J. Cole (as Ken Duncan)
Crew
Screenplay
Role
The Martian Airfield Captain
Crew
Screenplay