The discovery of Abyssinia by the Portuguese in 1520. A facsimile of the relation entitled Carta das Novas que vieram a el Rey nosso Senhor do descobrimento do Preste Joham, Lisbon 1521. [Composed from the letters of Diogo Lopes de Sequeira and Pero Gomes de Teixeira] /
British Museum.Department of Printed Books.
Cortesão, Armando,1891-1977.
London,
1938.