4 - Map sheet 4 SE (地图). Andermat 2014. 1:200'000. National Map 1:200'000. Wabern, Switzerland: Federal Office of Topography – swisstopo. [2017-07-05]. ISBN 978-3-302-00004-6 –通过map.geo.admin.ch.
s.geo.admin.ch
4 - Map sheet 4 SE (地图). Andermat 2014. 1:200'000. National Map 1:200'000. Wabern, Switzerland: Federal Office of Topography – swisstopo. [2017-07-05]. ISBN 978-3-302-00004-6 –通过map.geo.admin.ch.