[Koha] marc editors and importing records

Hello I have finally bought my first e-book ! The book supplier I used has sent me the MARC record as a .usm file but I do not have any idea how to open it or how to import the record into KOHA. Do I need to download/buy some external Marc Editor and how can I then import it into KOHA? As usual, any help and advice greatly appreciated! Regards Lisa [Description: Description: Description: CR_logo_POS_COULEUR b] LISA PEEL, PGDip, MA. Librarian César Ritz Colleges Switzerland 1897 Le Bouveret - Switzerland Tel: +41 24 482 82 82 Fax: +41 24 482 82 80 E-mail: lisa.peel@ritz.edu<mailto:hortense.hofer@ritz.edu> http://www.ritz.edu<http://www.ritz.edu/> - http://www.culinaryarts.ch<http://www.culinaryarts.ch/>