<div class="fn value">
Photos mainly by H. Graumann and I. Piedade Pó, void of copyright as collective work. Texts by Tenente Mário Costa (1893-1968) still under copyright.</div>
Scan of original book from <a rel="nofollow" class="external text" href="http://memoria-africa.ua.pt/Library/AFDCM.aspx">Memórias d'África e d'Oriente, Aveiro University</a>