Text ( visual ) : unmediated Impact of the depression on business activity and real income in Minnesota / Roland S. Vaile...[et al.]. -- Minneapolis : University of Minnesota Press , 1933. -- 59 p. ; 24 cm. -- (University of Minnesota studies in economics and business ; no. 8). -- (BA30964732) ; https://ci.nii.ac.jp/ncid/BA30964732 Author Heading(s): Vaile, Roland S. (Roland Snow)

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