• [1]

    G. Charpak and F. Sauli, Nacl, lnstr. and Meth., 113(1973), 381[2] F. Sauli, Nucl. Insr. and Meth., 156(1978), 147.[3] G. Charpak et al., Nucl. lnstr, and Meth., 167(1979), 455.[4] I. Endo et al., Nucl. Instr. and Meth., 188(1981), 51.[5] N. Awaji et al. Nucl. Instr, and Meth., 198(1982). 243.