PTBnews 02.1 English editionMarch 2002ISSN 1611-1621 Published by Physikalisch-Technische Bundesanstalt (PTB) Braunschweig and Berlin · Germany
Chief Editor Jens SimonPTB, Bundesallee 100D-38116 Braunschweigphone: (+49 531) 592-30 06fax: (+49 531) 592-30 08e-mail: ptbnews@ptb.de