Long cores from smalllakes—recovering upto 100 m-long lakesediment sequenceswith a high-precisionrod-operated pistoncorer (Usinger-corer) Jens MingramJörg F. W. NegendankAchim Brauer2006 год

Long cores from small lakes—recovering up to 100 m-long lake sediment sequences with a high-precision rod-operated piston corer (Usinger-corer)
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