00513nam a22001817a 4500008004100000020001800041041001400059082002300073100004200096245003900138250000600177260003400183300002700217650001500244650001400259952004300273999001500316260519b        |||||||| |||| 00| 0 eng d  a970-10-2969-0  aEspañol  aR 574.5 V 335:2 ec  aGuadalupe Ana María Vásquez Torre  aEcología y Formación Ambiental  a2  aMéxicobMcGraw - Hillc2007  a343p.bil.c21 x 27 cm  aEcología  aAmbiental  aBIBLCUNORIbBIBLCUNORIyLIBRO FÍSIa  c1620d1620