note Anonymous Monk <p>Something like this? (untested)</p> <code> for my $bibkey (sort keys %bibliography) { my $entry = $bibliography{$bibkey}; print "$bibkey:\n"; for my $key (sort keys %$entry) { print "\t$key => ", $entry->{$key}, "\n"; } } </code> <p>Alternatively, <c>$Data::Dumper::Sortkeys = 1;</c></p> 1007737 1007808 2