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Fresenius' journal of analytical chemistry, 365 (1999) S. 282 - 285
...Becker, J. S....
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Atomic spectroscopy, 20 (1999) S. 6 - 12
...Becker, J. S....
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Journal of analytical atomic spectrometry, 14 (1999) S. 933 - 937
...Becker, J. S....
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Fresenius' journal of analytical chemistry, 365 (1999) S. 429 - 434
...Becker, J. S....
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Thin solid films, 336 (1999) S. 26
...Becker, J. S....