000			00325nam a2200145Ia 4500
008			180626s9999 xx 000 0 und d
082			_a500 W652s 1991
100			_aWilkes, Angela
245		0	_aSimple science
260			_aLondon
260			_bUsborne Pub. Ltd.
260			_cc1991
300			_a38 p
650			_aScience
999			_c47588 _d47588