00707nam a22002057a 4500003000400000005001700004008004100021020001500062040000800077082002600085100003900111245005600150260003800206300001100244490000900255650005900264942001200323999001300335952015300348OSt20150602155424.0030206s2002    ck            000 0 spa d  a9701030672  cOSt04221aCH 373.5745bR6371 aRodríguez de Vega, Gladys 9584900aCiencias Naturales 1 / cGladys Rodríguez de Vega  aMéxico : bMcGraw Hill, c2001.  a251 p.  aI v.042LEMBxEDUCACIÓN AMBIENTAL-ENSEÑANZA PRIMARIA95857  2ddccBK  c968d968  00102ddc3USAP4050708HONDauspsbuspscGENd2013-04-22l1oCH 500 R637 No.1 2001p05901r2018-07-02 00:00:00s2018-07-02tEj. 1w2013-04-22yBK