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Found 10 films with crew matching "Bertha Muzzy Sinclair"
Chip of the Flying U
1939
Bertha Muzzy Sinclair
Novel
King of the Rodeo
1929
Bertha Muzzy Sinclair
Story
Points West
1929
Bertha Muzzy Sinclair
Novel
Ridin' Thunder
1925
Bertha Muzzy Sinclair
Novel
Taming the West
1925
Bertha Muzzy Sinclair
Novel
The Galloping Devil
1920
Bertha Muzzy Sinclair
Novel
How Weary Went Wooing
1915
Bertha Muzzy Sinclair
Story
Shotgun Jones
1914
Bertha Muzzy Sinclair
Writer
Chip of the Flying U
1914
Bertha Muzzy Sinclair
Writer
Chip of the Flying U
1914
Bertha Muzzy Sinclair
Novel