000 00307nam a2200133Ia 4500
008 220201s1949 xx 000 0 eng d
082 _a510
_bKUC
100 _aKuchn, MH
245 0 _aMathematics for electricians
250 _a3
260 _bNewyork: Mc Graw Hills
_c1949
300 _a312
942 _2ddc
999 _c70653
_d70653