Referenced In

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

"and between the Lan-ts’ang and the Lú-Kiang or Salwen are the Lissús..."

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

"the stream from Yung-ch’ang communicates with the Salwen by a river"