000 00268nam a2200109Ia 4500
008 220201s1972 xx 000 0 eng d
100 _aSEYMOUR J
245 0 _aPHYSICAL ELECTRONICS
260 _aBRITAIN
_bSIR ISAAC PITMAN AND SONS
_c1972
300 _a438
942 _2ddc
999 _c89297
_d89297