----------------------------Original message----------------------------
Being depository library for The Netherlands we shelve all
materials in its originals form.
 
To prevent the unlinking of a cataloguing record with the
material we put as well shelf-number as CCK-record number (in
your case OCLC-record number) on the material. This is done with
every separate item in case somebody in future gets it into
his/her head to shelve the materials in another way, e.g.
separating cover from map.
 
Jan Smits
Map Curator Koninklijke Bibliotheek, National Library of The
Netherlands
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