- Hans-Rudlf. "
Artilleriewerk Forte Airolo" (in German). festung-oberland.ch.
Retrieved 7
January 2011. Schneider, Hans Rudolf. "
Artilleriewerk Motto Bartola"...
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October 2011.
Retrieved 5
January 2011. Schneider, Hans Rudolf. "A66
Artilleriewerk Follatères" (in German). Festung-Oberland.ch.
Archived from the original...
- 6355 St. Margretenberg,
Gemeinde Pfäfers,
Fortress Sargans,
Museum Artilleriewerk Tamina / A 6370, Taminaschlucht,
Gemeinde Bad
Ragaz Kastels / A 6400...
-
Kaufmann 2006, p. 20 Mary, Tome 2, p. 35
Kaufmann 2006, p.30 Wahl, J.B. "
Artilleriewerk (G.O.) Bréhain - A6" (in German). darkplaces.org.
Retrieved 4 May 2010...
-
armed and can hold more occupants.
Kaufmann 2006, p. 25 Wahl, J.B. "
Artilleriewerk (G.O.) Métrich - A17" (in German). darkplaces.org.
Retrieved 3 May 2010...
-
armed and can hold more occupants.
Kaufmann 2006, p. 25 Wahl, J.B. "
Artilleriewerk (G.O.)
Michelsberg - A22" (in German). darkplaces.org.
Retrieved 21...
-
January 2010. Mary, Tome 3, p. 95
Kaufmann 2006, p. 25 Wahl, J.B. "
Artilleriewerk (G.O.) Galgenberg — A15" (in German). darkplaces.org.
Retrieved 23 March...
-
armed and can hold more occupants.
Kaufmann 2006, p. 25| Wahl, J.B. "
Artilleriewerk (G.O.) Mont des
Welches - A21" (in German). darkplaces.org. Retrieved...
-
ouvrage is smaller, with
lighter arms.
Kaufmann 2006, p. 25 Wahl, J.B. "
Artilleriewerk (G.O.)
Billig - A18" (in German). darkplaces.org.
Retrieved 3 May 2010...
