[Koha] MARC export file conversion

I would like to import MARC records from http://katalog.nukat.edu.pl catalogue to Koha. In attachement you find MARC export file. Koha don't understand that. Does someone know quick way to conversion? <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> Virenfrei. www.avast.com <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>