By Yousef S. Galal   Sperfeld P.   Metzdorf J.   in Metrologia

ISSN:0026-1394|37|5|365-368

IOP Publishing‎(2000)‎

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By Yoon H. W.   Sperfeld P.   Yousef S. Galal   Metzdorf J.   in Metrologia

ISSN:0026-1394|37|5|377-380

IOP Publishing‎(2000)‎

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By Sperfeld P.   Yousef S. Galal   Metzdorf J.   Nawo B.   Möller W.   in Metrologia

ISSN:0026-1394|37|5|373-376

IOP Publishing‎(2000)‎

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By Sperfeld P.   Metzdorf J.   Yousef S. Galal   Stock K. D.   Moller W.   in Metrologia

ISSN:0026-1394|35|4|267-271

IOP Publishing‎(1998)‎

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