CRAWFORD, R JM, J COOPER, B M DYER, M D GREYLING, N TW KLAGES, P G RYAN, S L PETERSEN, L G UNDERHILL, L UPFOLD, W WILKINSON, M S DE VILLIERS, S DU PLESSIS, M DU TOIT, T M LESHORO, A B MAKHADO, M S MASON, D MERKLE, D TSHINGANA, V L WARD, and P A WHITTINGTON. “POPULATIONS OF SURFACE-NESTING SEABIRDS AT MARION ISLAND, 1994/95–2002/03”. African Journal of Marine Science 25 (May 12, 2005): 427–440. Accessed October 17, 2026. https://www.ajol.info/index.php/ajms/article/view/33155.