Below are several links that will provide you with additional information about the area the map plays in and some information about the railroads and equipment.

http://album.eisenbahnen.at/privatalbum/

http://www.semmering.at/en/

http://whc.unesco.org/sites/785.htm

http://www.landfruehling.at/partner/trsued/whsemmeringbahn/hist_E.htm