Encyclopaedia Britannica Films, Encyclopaedia Britannica Films, American Geological Institute, & American Geological Institute. (1958). Why do we still have mountains. Chicago, III.: Encyclopaedia Britannica Films.
Chicago Style CitationEncyclopaedia Britannica Films, Encyclopaedia Britannica Films, American Geological Institute, and American Geological Institute. Why Do We Still Have Mountains. Chicago, III.: Encyclopaedia Britannica Films, 1958.
MLA CitationEncyclopaedia Britannica Films, Encyclopaedia Britannica Films, American Geological Institute, and American Geological Institute. Why Do We Still Have Mountains. Chicago, III.: Encyclopaedia Britannica Films, 1958.
Warning: These citations may not always be 100% accurate.