[Koha] Inventory - Missing books search by date

Hi I have used the inventory tool of Koha 3.0 to check the items in the library I manage. Now I would like to have a list of all the missing items. For that I would like to search for items with le date-last-seen prior to 2008-06-01 (the date I started). How can I do that? In the search dialog I couldnt find a possibility to do so. Beda