2448-718X 2448-718X S2448-718X2019000401095 10.20430/ete.v86i344.978 Mexico 00 12 2019 00 12 2019 86 344 1095 1107

1983 7 3-4 3-4 257-67 1990 INEGI, ILET y Nafin 1988 1980 4 3 3 211-31 1984 1986 2 1 1 55-71 2013