"Contemporaries of Marco Polo" Boni & Liveright, New York* Lach, Donald F & Van Kley, Edwin J "Asia in the Making of Europe (Vol III)", University of Chicago Press, Chicago, 1993* MacGregor, John.
"Contemporaries of Marco Polo" Boni & Liveright, New York* Lach, Donald F & Van Kley, Edwin J "Asia in the Making of Europe (Vol III)", University of Chicago Press, Chicago, 1993* MacGregor, John.