2448-7678 2448-7678 S2448-76782003000200004 Mexico Mexico 00 06 2003 00 06 2003 32 92

1991 IPN 1994 1994 1984 1996 1994 2000 UNESCO 1997 1999 1996 Ciencia y Desarrollo 26 150 150 IPN 1999 IPN-ESCA 1999