000 00280nam a2200121Ia 4500
654 _aELEC
100 _aPiaggio, H.H.
245 _aAn Ele Treat On Diff Equas And Their Applications
260 _bBS Publications
_c1947
082 _bPIA
300 _a271p.
999 _c30082
_d30082
655 _aD-11
546 _aText in English
041 _aeng
300 _c23 cm.