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1.

図書
図書
1. Improvement for open navigation. 2nd ed
by B. F. Thomas, D. A. Watt
出版情報: New York : John Wiley & Sons , London : Chapman & Hall, 1913
シリーズ名: 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 ; pt. 1
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2.

図書
図書
2. Improvement by locks and dams. 2nd ed
by B. F. Thomas, D. A. Watt
出版情報: New York : John Wiley & Sons , London : Chapman & Hall, 1913
シリーズ名: 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 ; pt. 2
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