de Seabra, A.F. 1921 . As doenças das plantaçoes de cacau das Ilhas de S. Tomé e Principe. Os serviços técnicos de combate contra as epiphytias. Instituto Internacional de Biologia Colon Lisbon, Portugal 142 pp.

Notes: Title in English: [Diseases affecting the coccoa plantations in the islands of S.Tome and Principe. The technical services in the fight against epiphytes.] Host and locality records for 23 scale insects.