0121-1935 0121-1935 S0121-19352017000100055 Colombia 00 06 2017 00 06 2017 21 1 55 78

1 1983 296 397-402 2 3 2009 4 1981 24 170-2 5 1973 6 1941 16 2 2 212-5 7 2000 6 4 4 327-41 8 1974 9 1996 10 1989 Second Edition 11 2003 37 37-50 12 1993 13 2010 131 34 34 229-40