@book{8005,
	author = {Zerda, Alvaro... [et. al.] and Vel_squez, Germ_n},
	title = {Health insurance systems and access to medicines : case studies from Argentina, Chile, Colombia, Costa Rica, Guatemala and the United States of America.},
	publisher = {Pan American Health Organization,},
	year = {2002.},
	address = {Washington, D.C. : },
	note = {Published jointly by the World Health Organization Drug Action Programme and the Pan American Health Organization Division of Health Systems and Services Development.}
}