0185-1616 0185-1616 S0185-16162009000100113 10.22201/fcpys.24484903e.2009.0.18777 Mexico 00 04 2009 00 04 2009 16 113 124

1996 2000 2002 2005 1972 1967 4th 1962 1962 2001 55 761-800 2006 1979 1967 1965 93 3 3 881-909 1959