[Koha] Report help

I think this requires some regex magic :) So, if anyone can help me out that would be great: How do I create a report for all records that have both of the following items? A 942|c field that says Photographs and a leader fields that shows item type as book? I know that the 94$c is mapped to biblioitems.itemtype - so that's not the issue, it's the Leader bit I need help with. Nicole