1) Asian river 2) River of Asia 3) River in Asia 4) River of Russia 5) River in Russia 6) Russian waterway 7) Russian river 8) Waterway of Asia 9) Waterway of Russia 10) Waterway in Russia 11) Waterway in Asia Found on https://www.crosswordclues.com/clue/nerl
1) Asian river 2) River of Asia 3) River in Asia 4) River of Russia 5) River in Russia 6) Russian waterway 7) Russian river 8) Waterway of Asia 9) Waterway of Russia 10) Waterway in Russia 11) Waterway in Asia 
National Exposure Research Laboratory