Peace, war, and trade along the Great Wall : Nomadic-Chinese interaction through two millennia
Sechin Jagchid and Van Jay Symons
Indiana University Press, c1989
Pei Ya yu mu min tsu yü chung yüan nung yeh min tsu chien ti ho pʿing, chan cheng, yü mao i chih kuan hsi
Peace, war and trade relationships between the Northern Asian nomadic people and the agricultural Chinese