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100 _aEncyclopaedia Britannica
020 _a978-1-59339-854-5
942 _cBK
654 _aTechnology
654 _a
245 _aTechnology
260 _aChicago
_bEncyclopaedia Britannica lnc.
_c2009
082 _aR503
300 _a101
999 _c365607
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041 _aeng