Paramount Pictures Corporation, Rafran Cinematografica, San Marco Productions ; produced by Fulvio Morsella ; screenplay by Sergio Donati and Sergio Leone ; from a story by Dario Argento, Bernardo Bertolucci and Sergio Leone ; directed by Sergio Leone
a Paramount release ; the John Ford production ; screenplay by James Warner Bellah and Willis Goldbeck ; produced by Willis Goldbeck ; directed by John Ford
a Rafran-San Marco production ; a Sergio Leone film ; screenplay by Sergio Donati, Sergio Leone ; produced by Fulvio Morsella ; directed by Sergio Leone
a Rafran-San Marco production ; a Sergio Leone film ; directed by Sergio Leone ; produced by Fulvio Morsella ; screenplay by Sergio Donati, Sergio Leone