@book{51779,
	author = {Wittfogel, Karl A. and Feng, Chia-sheng.},
	title = {History of Chinese society, Liao (907-1125) /},
	publisher = {The American Philosophical society, },
	year = {c1949.},
	series = {Transactions of the American Philosophical Society, held at philadelphia for promoting useful knowledge.},
	address = {Philadelphia :}
}