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  1. or download this
    $Href = {1=>1, 2=>2};
*H = $Href;   # aliases the referenced variable as a real variable
print $H{1};
  2. or download this
    use strict;
sub foo {
...
      *H = $Href;   # define the alais  
      print $H{1};
}
  3. or download this
    use strict;
our %H;   #  have to create the global or local complains
...
      *H = $Href;   # define the alias  
      print $H{1};
}