"BUSINESS & ECONOMICS Real Estate General." . . "Verenigde Staten van Amerika." . . "Umweltpolitik." . . "USA." . . . . "anno 1980-1989" . . "anno 1970-1979" . . "Terres publiques États-Unis." . . "Öffentliches Grundeigentum." . . "Conservation des ressources naturelles États-Unis." . . . . . . . . . . . . . . . . . . . . . . . . . . . "Ronald Reagan and the public lands America's conservation debate, 1979-1984"@en . "Ronald Reagan and the public lands America's conservation debate, 1979-1984" . . "Ronald Reagan and the public lands : America's conservation debate, 1979-1984" . . . . "Electronic books"@en . . . . . . "Geschichte 1979-1984." . . "Geschichte (1979-1984)" . . "Milieubescherming. Milieutechnologie." . .