Macaulay, Frederick Robertson, 1882- The smoothing of time series / by Frederick R. Macaulay. - New York : National Bureau of Economic Research, incorporated, 1931. - 172 p. : ill., diagrs. ; 24 cm. - Publications of the National Bureau of Economic Research, incorporat ed ; no. 19 . Subjects--Topical Terms: Graphic methods.Statistics-- Graphic methods.Statistics. Dewey Class. No.: 519.6