http://www.yesnet.yk.ca/schools/projects/renaissance/marcopolo.html
Score: 18 Poor
http://www.thenagain.info/webchron/china/marcopolo.html
Score: 49 Weak
http://www.silk-road.com/artl/marcopolo.shtml
Score: 3 Poor
http://edsitement.neh.gov/lesson-plan/marco-polo-takes-trip#sect-introduction
Score: -1 Poor
