@book{248477,
	author = {Ruggles, Richard, and Ruggles, Nancy D.,},
	title = {National income accounts and income analysis /},
	publisher = {McGraw-Hill,},
	year = {1956.},
	address = {New York :},
	edition = {2nd ed.},
	note = {First ed. published in 1949 under title: An introduction to national income and income analysis.}
}