1870-7203 1870-7203 S1870-72032017000200139 Mexico Estados Unidos de América México 00 06 2017 00 06 2017 15 2 139 142

2009 38 367-78 2007 81 71-4 2007 4 491-4 2007 61 25-36 2010 73 20-1 2004 75 1135-40 2003 78 1363-8 2010 75 e44-6 2005 58 594-604 2008 10 131-7 2009 66 11-8