@book{65215,
	author = {Ruggles, Richard and Ruggles, Nancy D.},
	title = {National income accounts and income analysis},
	publisher = {McGraw-Hill},
	year = {1956.},
	address = {New York},
	edition = {2d ed.},
	note = {First ed. published in 1949 under title: An introduction to national income and income analysis.}
}