Populações indígenas de Angola
A Portuguese ethnological study of Angola's indigenous peoples by José de Oliveira Ferreira Diniz, published in Coimbra in 1918 for scholars and colonial readers. Its pictures are plain line maps of the Angola province, each with one tribal territory shaded in red or orange and labelled, showing rivers, towns and borders that a designer could use as simple geographic diagrams or territory-marking motifs.
