Malice Aforethought: The History of Booby Traps from World War One to Vietnam - Ian Jones - Google Books

http://books.google.de/books?ei=YcM5UtfRLcrAtQbF3oGABQ&hl=de&id=k_8gAQAAIAAJ&dq=%22+Copper+chloride&q=Copper+chloride

In Italy in 1943 British troops came upon a highly desirable billet abandoned by the retreating Germans, its front door invitingly half open. Entering cautiously through a window, to avoid the likely booby trap, they approached the front door from inside…