000			00333nam a2200133Ia 4500
008			210901s1972 xx 000 0 eng d
082			_a530 BLA
100			_aBlac, R.J.
245		0	_aPhysics Field and potential : unit 3
260			_aEngland _bPenguin books ltd _c1971
300			_a119p.
650			_aPhysics
942			_2ddc _cBK
999			_c11178 _d11178