@book{3161,
	author = {Wilder, Charles S.},
	title = {Limitation of activity and mobility;},
	publisher = {U.S. Public Health Service; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.]},
	year = {1968.},
	series = {United States. National Center for Health Statistics. Vital and health statistics. Series 10: Data from the National Health Survey. Data from the Health Interview Survey,},
	address = {Washington,}
}