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mapping a new observatory in Nauchnij
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minor corrections
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mapping hydrography
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mapping hydrography
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minor corrections
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mapping a bog
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minor corrections
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minor corrections
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mapping hydrography, beaches, paths, roads, earth banks, amenities near lower Verkhovka river and in Sopka town
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minor corrections
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minor corrections
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minor corrections
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minor corrections
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minor corrections
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mapping beaches, forests, bogs nearby lower Verkhovka and its mouth
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mapping tracks and hydrography near lower Verkhovka
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minor corrections
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minor corrections
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mapping Bolshaya Ryozhma and Verkhovka rivers, correcting nearby areas
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mapping tracks and hydrography in Lebedevka area