000 00287nam a2200109Ia 4500
008 160710s1958 xx 000 0 und d
100 _aPERRINE,JAMES OWEN
245 _aPHYSICS & MATHEMATICS IN ELECTIRCAL COMUNICATION
260 _bJOHN F. RIDER
_c1958
300 _a261
942 _2ddc
_cB
999 _c21975
_d21975