Saya mau tau Pautan luar dari Kawat berduri. Jelaskan dalam bahasa melayu

History of the invention of barbed wire

Barbed Wire Photo Gallery: DeKalb photos included, barbed wire examples pgs. 3 thru 24.

Development and Rise of Barbed Wire at University of Virginia dicapai 29 Mac 2006

Barbed Wire Fencing - Its Rise and Influence also at UVA, from Agricultural History, Volume 13, October 1939, dicapai 20 September 2006

Glidden's patent for barbed wire dicapai 29 Mac 2006

Antique Barbed Wire Society dicapai 21 September 2006