[Koha] Question for a librarian

Dear All: I need to be able to delete an entry, one bibl. record at a time. Also, later on we will start deselecting books from a small specialized library, of about 7000 volumes. Please send me the instructions. I tried the recipe from 13/6/07 it did not work. Regards from New Zealand, the land of the future, to you all, from a librarian fond of soccer, not rugby. Cheers, Silvia.