题名	责任者	出版社	索书号
The United States:Becoming a World Power	Leon F.Litwack	North West Publishing	D771.29/2*2
The United States:Becoming a World Power	Leon F.Litwack	North West Publishing	D771.29/2
The United States:Becoming a World Power	Leon F.Litwack	North West Publishing	D771.29/2*1