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Experiments on Mr. Babbage's method of distinguishing light- houses : reported to a committee of the United States Light-house Board
- "Distinguishing light-houses"@en
- "Experiments on Mr. Babbage's method of distinguishing light-houses, reported to a committee of the United States Light-House Board"
- "Experiments on Mr. Babbage's method of distinguishing light- houses : reported to a committee of the United States Light-house Board"@en
- "Experiments on Mr. Babbage's method of distinguishing light-houses reported to a committee of the United States Light-House Board"@en