Hello all, Could you share some experiences with a newbie and amateur librarian like me? I've started cataloguing old serials for my library. Many of them are very old or have had a long life, so there are many variations of periodicity, size, publisher, title... I've created biblio records and now I'm creating items for each volume/number/issue in our collection, and I was wondering whether it's possible to add subfields to 956 to note each volume's size and page number. What would be the best approach? Does any of you do this? What do you recommend? What are your practices when cataloguing old serial items? What kind of information you put, and in which subfields? So far my MARC framework is taking advantage of 952$h mapped to items.enumchron, and I wonder whether it's possible to create an adhoc subfield and map it to biblioitems.pages, but won't that conflict with 300$a? Same about mapping another 952 subfield to biblioitems.size, which is used by 300$c. Or else should I just make 952$z repeatable? Maybe my questions are silly, but I know nothing about databases and don't understand the inner workings of Koha. The official documentation is not very clear on the function of SQL tables like items.materials, items.copynumber, biblio.serial, biblioitems.volumedate... Rubeno Fernandez