Oldenbourg, Zoé, 1916-2002
The Crusades
Pantheon Books, 1966
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The Crusades
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A history of the crusades Vol I
1951
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Harris, Jonathan
Byzantium and the Crusades
Bloomsbury , 2014
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Sorensen, Bent
A history of energy : Northern Europe from the stone age to the present day
Earthscan, 2011
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