000			00309nam a2200109Ia 4500
001			83558
008			170722s9999 xx 000 0 und d
100			_aHennessy, David E.
245			_aElementary teachers classroom science demonstrations and activites by Elaine V Walworth /
260			_c1966.
942			_cGEN
999			_c71342 _d71342