Referenced In

The Travels of Marco Polo
by Marco Polo, da Pisa Rusticiano

"Book II.  Part I. … Mongol Imperial Family—Hunting Leopard—Cachar Modun—Bark of Trees—Value of Gold"

The Travels of Marco Polo
by Marco Polo, da Pisa Rusticiano

"CACHAR Modun must be the place called Ha-ch’a-mu-touen in the Yuan Shi"