The BibliOpass network gives you access to more than 600 institutions with a single user card, including national, cantonal and university libraries in Switzerland.
Register in one of the partner libraries! Once your library card has been validated by the other members of the network (see the conditions on the websites of the libraries you wish to use), you can consult their collections and borrow their documents.
The Swiss National Library coordinates interlibrary loans in the BibliOpass network.