Ruggles, Richard, 1916-2001 An introduction to national income and income analysis / Richard Ruggles - 2nd ed. - New York : McGraw-Hill Book Co., c1956 - viii, 452 p. : ill. ; 24 cm. Includes index Subjects--Topical Terms: Income.Income--United States. Dewey Class. No.: 339.3 / RUN 1956