"Microchemical studies of potato tubers affected with blue stem disease. "; "Hill, L. M.", "Orton, C. R. (Clayton Roberts), b. 1885."; "Potatoes--Diseases and pests."; "Hill, L. M.", "Orton, C. R. (Clayton Roberts), b. 1885."; "1938"; "Journal article reprint from: Journal of Agricultural Research, v.57:no.5 (1938:Sept.1). "; ""; "P16909"; "pec"; "Potatoes--Diseases and pests."; "14256"; .