@book{17722,
	author = {Vayda, Andrew Peter},
	title = {Explaining human actions and environmental changes},
	publisher = {AltaMira Press,},
	year = {c2009},
	address = {Lanham, MD :},
	note = {Description based on print version record},
	url = {http://www.netlibrary.com.libraryumpsa.idm.oclc.org/urlapi.asp?action=summary&v=1&bookid=281465}
}