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								[1]
								G. Charpak, IEEE, Trans. on Nucl. Sci., NS-22(1975), 269.[2] F. Sauli, Principles of Operation of Multiwire Proportional and Drift Chambers (CERN,1977). 
G. Charpak, IEEE, Trans. on Nucl. Sci., NS-22(1975), 269.[2] F. Sauli, Principles of Operation of Multiwire Proportional and Drift Chambers (CERN,1977).