Report of the branch of plant pathology for the year ending 31st December, 1938
Hopkins, J.C.F.
Report of the branch of plant pathology for the year ending 31st December, 1938 - Salisbury 1939 - 1-9 p. - Rhodesia Department of Agricu .
Report of the branch of plant pathology for the year ending 31st December, 1938 - Salisbury 1939 - 1-9 p. - Rhodesia Department of Agricu .