2020-10-08T08:43:56.0430000Z
https://www.termdat.bk.admin.ch/entry/133885
DFI, Quadrilinguisme en Suisse, 1989, p. 44
BoBR Sprachenartikel, Ziff. 123.2 (BBl 1991 II 318)
UNESCO, World culture report 2000, Cultural diversity, conflict and pluralism, 2000, p. 39 ([Internet, 2020-10-08](https://unesdoc.unesco.org/ark:/48223/pf0000121058))
DFI, Quadrilinguismo svizzero, 1989, pag. 53