Op [http://www.trainweb.org/signals/grssls1.htm GRS] (GRS = General Railway Signal Company) staat: "searchlight signal displaying red, yellow and green aspects." En op [https://en.wikipedia.org/wiki/North_American_railroad_signals Wikipedia] spreekt men ook over "aspect" in combinatie met kleuren. [[Verklarende woordenlijst#Bronnen|(3)]] | Op [http://www.trainweb.org/signals/grssls1.htm GRS] (GRS = General Railway Signal Company) staat: "searchlight signal displaying red, yellow and green aspects." En op [https://en.wikipedia.org/wiki/North_American_railroad_signals Wikipedia] spreekt men ook over "aspect" in combinatie met kleuren. [[Verklarende woordenlijst#Bronnen|(3)]] |