Additional file 6 of Supply ranges of stone blocks used in masonry bridges and their construction period along the East Royal Road in the Khmer Empire, Cambodia UchidaEtsuo SakuraiYuichiro ChengRathborith ShimodaIchita SaitoYu 2020 Additional file 6: Results of cluster analyses using single linkage, complete linkage, group average, centroid, median , and Ward’s methods.