000 00268nam a22000857a 4500
008 210302b ||||| |||| 00| 0 eng d
050 _aQC507
245 _aEarly electrodynamics
_bthe first law of circulation
_cTRCKER, R.A.R.
942 _2lcc
_hQC507 .T75 1965
999 _c1298
_d1298