. "The improvement of rivers : a treatise on the methods employed for improving streams for open navigation, and for navigation by means of locks and dams" . "The improvement of rivers : a treatise on the methods employed for improving streams for open navigation, and for navigation by means of locks and dams"@en . "The improvement of rivers a treatise on the methods employed for improving streams for open navigation, and for navigation by means of locks and dams"@en . . . . "The improvement of rivers; a treatise on the methods employed for improving streams for open navigation, and for navigation by means of locks and dams"@en . "The improvement of rivers; a treatise on the methods employed for improving streams for open navigation, and for navigation by means of locks and dams" . . . . . . . . . "The Improvement of rivers" . . "The improvement of rivers : a treatise on the methods employed for improving streams for open navigation and for navigation by means of locks and dams"@en . . . . . . . . "The improvement of rivers : A treatise on the methods employed for improving streams for open navigation, and for navigation by means of locks and dams" . . . . . "The improvement of rivers: a treatise on the methods employed for improving streams for open navigation, and for navigation by means of locks and dams. [With plates.]" . "The improvement of rivers. A treatise on the methods employed for improving streams for open navigation, and for navigation by means of locks and dams" . "The improvement of rivers. A treatise on the methods employed for improving streams for open navigation, and for navigation by means of locks and dams"@en . "The improvement of rivers A treatise on the methods employed for improving streams for open navigation, and for navigation by means of locks and dams"@en . . . . . "Improvement of rivers"@en . . . . . "Rivers." . .