[Koha] Importing multiple items into a record

Hello! I am migrating data from a old library system to Koha. Right now multiple copies of a book appear as independent records. How do I display them as multiple items in a single record. Something like {Check_out; item--;Check_in; item++} I saw that the mrk file record needs to have data with multiple 952$p values. How do I automate the matching process? Thanks. Regards -- Vikram Vincent +919448810822 080 4012 9072 It's 'Free' as in Swatantra.