1995

Natl Park Service

2006

National Park Service Division of Publications (= U. S. National Park Service Handbook 151)

1983

United States National Park Service. Division of Publications

1989

Produced by the Division of Publications National Park Service

North York Moors National Park Information Service

1995

NSW National Parks and Wildlife Service

Canberra, Australian National Parks and Wildlife Service 1981

1979

Hobart : National Parks and Wildlife Service, 1979.

1982

Canberra : Australian National Parks and Wildlife Service, 1982.