[Koha] exporting bibliographic records

I have koha 3.10.5 installed in debian 6.0 64bit. I'm trying to export my book item bibliographic holdings, with no option in from biblionumber and to biblionumber, item type books, library: all, and all others not ticked. I'm exporting it into marc. Only 5,000 plus were imported when in fact when I search my OPAC with itemtype books I get 8,000 plus. How come there were bibliographic records not imported. Thanks and good day! -- View this message in context: http://koha.1045719.n5.nabble.com/exporting-bibliographic-records-tp5753557.... Sent from the Koha-general mailing list archive at Nabble.com.