Maysles Films Inc.: Performing Vérité.

Salesman (1969) documentary Directed by Albert Maysles, David Maysles, Charlotte Zwerin Shown on the set, from left: bible salesman Paul Brennan (aka The Badger), producer-director-editor David Maysles, producer-director-cinematographer Albert Maysles

http://www.nga.gov/content/ngaweb/calendar/film-programs/Maysles.html