My current work.. Koha

My current work is to setup a KOHA server for HCL CMS. Test setup is done properly, now the data migration.
For the users it is going to be easy. I need to insert in borrowers table from our SAP database. Though no sample data is available for me, but it seems to be easy.

The records for the books are in opposite condition. Koha has the power to import MARC records. The current app is in Lotus Notes. I thought, I will at least get a CSV format data, from which MARC records will be created and at last will use Koha to import. Pymarc module is good to work with MARC in python.
But our people didn't create a database for the books good enough to create MARC records. They don't have ISBN !!!!