Burgenkarte der Schweiz und des angrenzenden Auslandes.
Wabern-Bern :  Eidg. Landestopographie, 
1974-1985.
Base map: Official 1:200,000 series.
Each sheet accompanied by booklet of larger scale maps and plans, a text describing the individual castles and a romer for the Swiss topographie series.
In Ger, Fr. It.