The search engine requires that a string is entered at least in
the first line.
In each line strings separated with a blank will be regarded as
AND-connected in the search. If you really want blanks to be taken
into account enter "_" instead (e.g. de_Boer).
If in an AND-connected search not all strings should appear
highlighted in the entry this is due to the fact that only a part of
the data in the database is displayed.
If books should be listed more than once this is due to a wrong
entry in the database ALLEGRO. This will be corrected.
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