The Interlibrary service enables CGS library users to obtain documents related to their scientific interests from other libraries in the Czech Republic or from libraries abroad if these are not held in the CGS Library. This may involve interlibrary loans of books or the supply of articles copied from journals or proceedings. This service is provided free to the staff of CGS; the costs of the interlibrary service are covered by the CGS Division of Informatics. For other users a fee is charged for this service to cover the costs involved.