@book{13957,
	author = {Daugherty, Helen Ginn. and Kammeyer, Kenneth C. W.},
	title = {An introduction to population /},
	publisher = {Guilford Press,},
	year = {c1995.},
	address = {New York :},
	edition = {2nd ed.},
	note = {Kammeyer's name appears first on the earlier edition.},
	url = {http://www.loc.gov/catdir/bios/guilford051/95006657.html}
}