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National Park Service statistical abstract
USA / National Park Service - Denver, Colo. - 1985 -
Persistent link: https://www.econbiz.de/10000551598
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Annual information exchange / National Association of State Park Directors : state park statistical data for the year ending June 30, ..
National Association of State Park Directors - Tallahassee, Fla. - Nachgewiesen 1993 - 1998; 21.1999 -
Persistent link: https://www.econbiz.de/10000545203
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Hotels and national parks
Tansania / Bureau of Statistics - Dar es Salaam - 1.1972/81 - 6.1987(1988)[?]
Persistent link: https://www.econbiz.de/10003838239
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Statistical abstract / National Park Service, Public Use Statistics Office
USA / Public Use Statistics Office; USA / National Park … - Denver, Colo. - 1996 -
Persistent link: https://www.econbiz.de/10001786058