2448-718X 2448-718X S2448-718X2006000100067 10.20430/ete.v73i289.554 USA 00 03 2006 00 03 2006 73 289 67 86

1998 53 4 4 1245-84 2001 1991 2003 1998 43 3 3 749-61 1998 41 27-38 1998 45 1 1 81-109 1983 85 191-206 2003 89 2 2 55-71 2003 109 220-45 2004 1988 61 1 1 45-64 1988 40 751-81 1988 96 3 3 568-91 2003 111 1 1 103-23 1988 12 3-16 1996 20 3-13