National park26 titles

It's a Mad, Mad, Mad, Mad World

07 Nov 1963

Grizzly

21 May 1976

The Battle of Gettysburg

01 Dec 1955

Dangerous Mission

06 Mar 1954

Guardian of the Wilderness

07 Dec 1976

Red Hot Rangers

03 May 1947

Monumental Utah

29 Jul 1944

Wildlife in the Rockies

01 Jan 1957

The Virgin Goddess

18 Aug 1974

In Glacier Park

17 Dec 1917

Wonders of Yellowstone

13 Aug 1917

Yellowstone Park: 'Nature's Playground'

24 Oct 1936

Geysers of the Yellowstone

06 Aug 1917

Glacier Park and Waterton Lakes

24 Apr 1942

Mighty Niagara

30 Jan 1943

Rocky Mountain Grandeur

21 Jun 1937

Scenic Oregon

26 Jun 1943

Colorful Colorado

20 May 1944

A Day in the National Parks

15 Jul 1978

Parks and People: Dope

01 Jan 1970

Dartmouth, River Dart and Dartmoor

01 Jan 1910

Jasper National Park

19 Apr 1952

Yosemite the Magnificent

10 May 1941

Zion: Canyon of Colour

27 Nov 1934