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Search keyword：(Author: #Ralph Philip Lee)
World civilizations; their history and their culture / Edward McNall Burns and Philip Lee Ralph
v. 1,v. 2. - 5th ed. - New York : Norton , c1974
World civilizations : from ancient to contemporary / Edward McNall Burns and Philip Lee Ralph
v. 1,v. 2. - 3rd ed.. - New York : Norton , c1964