1405-3195 1405-3195 S1405-31952006000100117 Mexico Mexico 00 02 2006 00 02 2006 40 1 117 124

1954 41 190-9 2002 36 3 3 337-44 2003 37 2 2 177185 1998 Third 1987 1987 SAS Institute 1995 1996 3