@book{6549,
	author = {Chen M ... [et al.]. and Andersen R M. and International Collaborative Study on Oral Health Care Systems (2nd).},
	title = {Comparing oral health care systems : a second international collaborative study.},
	publisher = {World Health Organization,},
	year = {1997.},
	address = {Geneva : },
	note = {Published by the World Health Organization in collaboration with Center for Health Administration Studies, the University of Chicago.}
}