The cultivation of cotton in Angola/ by Frederick Welwitsch; translated by A. R. Saraiva from the original official pamphlet published at Lisbon by order of the Portuguese Government  . - London: Printed by Wertheimer and Co, 1861  . - 16 p.

Welwitsch, Friederich Martin Josef, 1806-1872; Saraiva, António Ribeiro, 1800-1890, trad.