1405-3322 1405-3322 S1405-33222006000200265 10.18268/bsgm2006v58n2a10 Mexico 00 00 2006 00 00 2006 58 2 265 269

1986 2000 1959 I y II 1928 23 3 3 263-91 1984 1988 2006 1925 95 874-8