" London: R. Bentley, 1849.googlebooks Accessed November 17, 2007* Tuchman, Barbara Wertheim, "A distant mirror: the calamitous 14th century", Random House Publishing Group, 1978.;Attribution
" London: R. Bentley, 1849.googlebooks Accessed November 17, 2007* Tuchman, Barbara Wertheim, "A distant mirror: the calamitous 14th century", Random House Publishing Group, 1978.