Pack Howard Macroeconomic implications of factor substitution in industrial processes Pack Howard - Washington DC World Bank USA 1980 - "vii, 60p." cm. - World Bank Staff Working paper . Bib p 56-60 Standard No.: 35225 Source: Reference Collections Subjects--Topical Terms: Macroeconomics Dewey Class. No.: "X:72.1.N7, M0/UN"