@book{34455,
	author = {Hay, Donald G.},
	title = {Independent health insurance plans in the United States, 1961,},
	publisher = {U.S. Dept. of Health, Education, and Welfare, Social Security Administration, Division of Research and Statistics; [for sale by the Superintendent of Documents, U.S. Govt. Print. Off.,},
	year = {1963},
	address = {[Washington]}
}