Question - Vallo Alpino - Alpenwall - any sources / maps ?

[The Franconian]

End of July, 1.FC Nürnberg, the football team I support are doin summer training camp in Tirol, Natz-Schabs near Brixen.
https://goo.gl/maps/NZU2dyBoB2C2
I'm planing to go there and have seen some bunkers on the map.
I got only little knowledge to that thematic alpine fortifications
http://www.moesslang.net/alpenwall_2_wk.htm
doing my own research in german, but maybe you got some good english stuff
so:
Can anybody recommend good sources, maps or so or recommend places to visit there ?
thanks