000 00432nam a2200181Ia 4500
008 170705s9999 xx 000 0 und d
020 _a9780516246604
245 _aWhat is density? /
245 _cJoanne Barkan.
260 _aNew York :
260 _bScholastic,
260 _c2006
300 _a31 pages :
300 _bcolor illustration ;
300 _c18cm.
440 _aRookie read-about science.
500 _a330
999 _c336060
_d336060