000 00515nam a22001697a 4500
999 _c42580
_d42580
005 20191019005713.0
008 191019b ||||| |||| 00| 0 eng d
040 _cGSLRC
082 _aCIR 510 M42 2009
245 _aMathematics.
260 _aChicago, IL :
_bWorld Book,
_cc2009.
300 _a48p. : col. photos
440 _nInventions and discoveries
500 _aIncludes glossary and index
650 _21. Mathematics--Study and teaching (Secondary)--Juvenile literature
942 _2ddc
_cBK