Referenced In

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

"Chinese authorities quoted by Ritter mention mother-o’-pearl as a product of Lithang..."

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

"Mr. T. T. Cooper crossed it further north, by Ta-t’sien lu, Lithang and Bathang;"