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Narva, river, Estonia and Russia

(Encyclopedia)Narva, river, c.50 mi (80 km) long, rising in Lake Peipus (Chudskoye), E Estonia, and flowing northeast past the city of Narva into the Gulf of Finland. It forms the border between Estonia and Russia....

North Platte, river, United States

(Encyclopedia)North Platte, river, c.680 mi (1,090 km) long, rising in the Park Range, N Colo., and flowing in a great bend N through SE Wyo., then east across the plains of W central Nebr. to join the South Platte...

Oise, river, Belgium and France

(Encyclopedia)Oise, river, 186 mi (299 km) long, rising in the Ardennes Mts., S Belgium, and flowing through N France generally SW past Compiègne to join the Seine River near Pontoise. Navigable for most of its le...

Oka, river, central European Russia

(Encyclopedia)Oka əkäˈ [key], river, c.925 mi (1,490 km) long, rising S of Orel, central European Russia. It flows N past Orel and Kaluga, E past Serpukhov, Kolomna, and Ryazan, and then NE past Murom to join th...

Paraguay, river, Brazil and Paraguay

(Encyclopedia)Paraguay, river, c.1,300 mi (2,090 km) long, rising in the highlands of central Mato Grosso state, Brazil. Flowing generally southward, it forms the border between Brazil and Paraguay in the pantanal,...

Obed Wild and Scenic River

(Encyclopedia)Obed Wild and Scenic River: see National Parks and Monuments (table)national parks and monuments (table). ...

Madeira, river, Bolivia and Brazil

(Encyclopedia)Madeira mədāˈrə [key], river, c.2,100 mi (3,380 km) long, formed by the junction of the Beni and Mamoré rivers on the Bolivia-Brazil border. It flows north along the border for c.60 mi (100 km), ...

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