@book{2763,
	author = {Helgren, David M. and Sager, Robert J.},
	title = {People, places and change: an introduction to world studies. /},
	publisher = {Holt, Rinehart and Winston,},
	year = {2005.},
	address = {Orland:},
	note = {Includes Appendix, Glossary and Index.}
}