. . . . . . . . . . . "Reiseführer" . . "Birds of Yellowstone a practical habitat guide to the birds of Yellowstone National Park, and where to find them"@en . . . "Birds of Yellowstone : a practical habitat guide to the birds of Yellowstone National Park, and where to find them" . . . . . . . "Vogelbeobachtung." . . "Beobachtung." . . "Yellowstone National Park." . . "Vögel." . . "USA." . .