000 00318nam a2200121Ia 4500
008 160306s9999 xx 000 0 und d
020 _a516101080
080 _aR5(03)
_bYOU
245 _aYoung people's science encyclopedia
260 _c1991
_aChicago
_bChildewns Press, Inc
300 _a 707-797 p.
942 _cBK
_2udc
999 _c34429
_d34429