In ring binders.
v. 1. Early civilizations (prehistory to 300 CE)
v. 2. The expanding world (300 to 1750)
v. 3. The age of revolution (1750 to 1914)
v. 4. The 20th century.
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World history on file. ISBN 0816063761. Published by Facts on File in 2007. Publication and catalogue information, links to buy online and reader comments.
