0185-3929 0185-3929 S0185-39292008000200135 México 00 00 2008 00 00 2008 29 114 135 160 CROM 1929 ^s83 ^s83 83 CROM 1929 CROM 1929 CROM 1929 CROM 1932 1935 1934 1935 1980 1994 1977 CROM 1935 1979 2007 1981 16 16 1988 1979