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Item The life-history of the shot-hole borer of tea(Tea Research Institute. Thalawakle, 1941) Gadd, C.H.Item Ring-barking of trees and root diseases(Tea Research Institute. Thalawakle, 1940) Gadd, C.H.Item Diseases of the tea bush II. root diseases(Tea Research Institute. Thalawakele, 1936) Gadd, C.H.Item A destructive root disease of tea caused by the nematode Auguillulina pratensis(Tea Research Institute. Thalawakele, 1939) Gadd, C.H.Item A report on the tea small-holdings in the Uda-Nuwara division of the central province(Tea Research Institute. Thalawakele, 1936) Gadd, C.H.Item A virus disease of tea(Tea Research Institute. Thalawakele, 1939) Gadd, C.H.Item The treatment of Poria root disease of tea(Tea Research Institute. Thalawakele, 1937) Gadd, C.H.Item Observation on an attack by shot-hole borer on tea(Tea Research Institute. Thalawakele, 1941) Gadd, C.H.Item Disease in non-productive bushes(Tea Research Institute. Thalawakele, 1939) Gadd, C.H.Item Studies of shot-hole borer of tea V-borer population(Tea Research Institute. Thalawakele, 1949) Gadd, C.H.