Text ( visual ) : unmediated A study of potato pre-packing costs / Thorald Warley, Donnan Baron. -- Loughborough : University of Nottingham School of Agriculture, Dept. of Agricultural Economics , 1958. -- 23 p., [1] folded leaf of plates : ill. (1 col.) ; 24 cm. -- (BA91896396) ; https://ci.nii.ac.jp/ncid/BA91896396 Author Heading(s): Warley, T. K. (Thorald Keith) ; Baron, Donnan