Westerns:

• Pat Garrett and Billy the Kid (1973)
• Junior Bonner (1972)
• Ballad of Cable Hogue, The (1970)
• Wild Bunch, The (1969)
• Glory Guys, The (1965)
• Major Dundee (1965)
• Ride the High Country (1962)
• Deadly Companions, The (1961)
• "Westerner, The" (1960)
• "Rifleman, The" (1958)
• "Trackdown" (1957)
• "Broken Arrow" (1956)
• "Zane Grey Theater" (1956)
• "Gunsmoke" (1955)

Academy Awards/Nominations: Nominated Best Writing, story, screenplay - The Wild Bunch (1970)