00418nam a2200121 a 450000500170000000800410001705000210005824500330007926000400011244000150015299900190016795201100018620140414132051.0110712s19uu    xx            00    eng d  aREF 031bCHI V.7  aChildcraft: How things work.  aChicago :bWorld Book, Inc.,c1987.  aChildcraft  c114171d114171  001040aMUbMUcREFd2011-07-12efr. ELIl0oREF 031 CHI V.7pM5923r2014-04-14 00:00:00w2014-04-14yBK