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								Bollinger L M,Thomas G E. Rev. Sci. Instr,1961,32:1044[2]Moszynski M, Bengston B. Nucl. Instr. and Meth,1977,42:417[3]Nikl M et al.CERN/PPE Report CMSTN/95-$$$ 
Bollinger L M,Thomas G E. Rev. Sci. Instr,1961,32:1044[2]Moszynski M, Bengston B. Nucl. Instr. and Meth,1977,42:417[3]Nikl M et al.CERN/PPE Report CMSTN/95-$$$