000			00351nam a2200145Ia 4500
008			241226s9999 xx 000 0 und d
020			_a0-13-940503-8
082			_a428 _bDUF
100			_aDuffy, P
245		0	_aVariations
260			_aNew Delhi : _bPrentice Hall Publication, _c1986.
300			_ax,229
365			_a606.94
650			_aGeneral
999			_c132108 _d132108