Instructions to rain-fall observers of U.S. Geological Survey (Q137656)

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Instructions to rain-fall observers of U.S. Geological Survey; 1889; 1; U.S. Geological Survey
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English
Instructions to rain-fall observers of U.S. Geological Survey
Instructions to rain-fall observers of U.S. Geological Survey; 1889; 1; U.S. Geological Survey

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