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FRESENIUS ZEITSCHRIFT FUR ANALYTISCHE CHEMIE,
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ANALYTICAL DETERMINATION OF ANION TENSIDES IN SUSPENDED AND SETTLING SEDIMENTS AND SEWAGE SLUDGE
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FRESENIUS ZEITSCHRIFT FUR ANALYTISCHE CHEMIE,
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FRESENIUS ZEITSCHRIFT FUR ANALYTISCHE CHEMIE,
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DETERMINATION OF NONIONIC TENSIDES IN WATER AND WASTE-WATER BY X-RAY-FLUORESCENCE ANALYSIS AND IR-SPECTROSCOPY
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