Šlem — разлика између измена

* {{Cite book |ref= harv|last= |first= |authorlink= |coauthors= |title= "Helmets...A Medieval Note In Modern Warfare"|year= |url=httphttps://books.google.com/books?id=XicDAAAAMBAJ&lpg=PA56&pg=PA56#v=onepage&f=true|publisher= |location= |id=}}, August 1942.