2448-6558 2448-6558 S2448-65582017000200441 10.24201/nrfh.v65i2.3102 Mexico 00 12 2017 00 12 2017 65 2 441 469

1980 2 71-84 2002 2007 2007 1972 1982 2001 2001 1982 2001 2003 2013 1942 2007 2001 275-312 1984 1 1 291-302