000 00861ctm a2200229u 4500
005 20171010072919.0
007 ta
008 090520|||||||||||||||||||||||||||||eng|u
020 _a978-1-59920-083-5
_cSpring 2009 World Almanac Education $24.40
100 1 _aOxlade, Chris.
245 1 0 _aLevers
260 0 _aMankato, MN
_bSmart Apple Media
_c2008
300 _b32p.: col. photos
520 _aThere are levers all around us - from the seesaw in the playground to the scissors in our homes. But what are levers, and how do they work?
521 1 _aElementary
650 4 _aSimple machines.
650 4 _aLevers.
650 4 _aLifting and carrying.
961 w l _t12
999 _c52840
_d51510