0186-7210 0186-7210 S0186-72102009000300675 10.24201/edu.v24i3.1332 Colombia Colombia 00 12 2009 00 12 2009 24 3 675 696

1992 1 1 107-82 1994 1951 13 13 359-73 2005 313 313 5-18 2001 4 2 2 1999 1941 20 20 224-50 1951 13 13 222-59 1991 1999 Washington 1988 22 22 3-42 1992 107 107 407-13 2001 13 13 13-38 2002 2 2 2 217-32 1996 40 6 6 1353-75 1986 94 5 5 1002-37 2000 1986 43-5 1999 1956 70 70 65-94 1956 32 63 63 334-61 1971