The professional forecaster : the forecasting process through data analysis / James P. Cleary, Hans Levenbach. Cleary, James P. Levenbach, Hans. Economic forecasting. Business forecasting. Forecasting. HB3730 .C546 338.5 19 CLP Sequel to: The beginning forecaster / Hans Levenbach. Includes index. Bibliography: p. 385-398. Belmont, Calif. : Lifetime Learning Publications, c1982. c1982. 1982 Text xi, 402 p. : eng