Submitted on: 31 December 2000.
Revised on: 09 January 2001.
Accepted on: 02 February 2001.
RADIATION MEASUREMENTS---PERGAMON-ELSEVIER SCIENCE LTD
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Submitted on: 27 October 1999.
Revised on: 07 November 1999.
Accepted on: 21 November 1999.
RADIATION MEASUREMENTS---PERGAMON-ELSEVIER SCIENCE LTD
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