Yes, there is for the publishers that offers the MARC Records of their e-books. You can find the files you need in the protected webpages for the contact persons of the HEAL-Link members, under the menu “Librarians” and the submenu “About subscriptions” (Please note that only the contact persons of the HEAL-Link members can access the protected webpages and this submenu is only available in the Greek version of HEAL-Link portal).