00494nmm a2200169Ia 4500008004100000020001800041041000800059100002100067245003100088264005900119300001700178490003000195650002400225856005100249942000700300999001700307251105s9999||||xx |||||||||||||||||und||  a9781621690573  aspa  aSilverman, Buffy 0aUtilizo máquinas simples  a[Madrid, España] :bRourke Educational Media, c2012  a24 páginas  aMi biblioteca de ciencias  aAges 9-12 Years Old  uhttps://public.digitaliapublishing.com/a/24845  cCF  c75276d75276