Savage Sam 1963
Novel, Writer
Sancho, the Homing Steer 1962
Story
Hound-Dog Man 1959
Writer
Old Yeller 1957
Screenplay
The Brush Roper 1955
Return of the Texan 1952
Novel
'Old Yeller': Remembering a Classic 2002
as Self (archive footage)
Credits from TMDB.