Text ( visual ) : unmediated Factors affecting the price of potatoes in Great Britain / by Ruth L. Cohen. -- Cambridge : W. Heffer , 1930. -- iv, 55 p. ; 25 cm. -- (University of Cambridge, Department of Agriculture, Farm Economics Branch report ; Report no. 15). -- (BA50781473) ; https://ci.nii.ac.jp/ncid/BA50781473 Author Heading(s): Cohen, R. L. (Ruth Louisa)

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