0185-1616 0185-1616 S0185-16162019000300011 10.22201/fcpys.24484903e.2019.48.70418 Mexico 00 12 2019 00 12 2019 48 11 19 1968 1967 2013 1986 1956 1964 1973 1971 1991 1991 1990 1993 2010 61 1 1 74-9 1967