REFERENCES
- Bierman , W. H. and Voous , K. H. 1950 . Birds observed and collected during the whaling expeditions of the “Willem Barendsz” in the Antarctic 1946–47 and 1947–48 Leiden
- Mackworth-Praed , C. W. and Grant , C. H. B. 1960 . Birds of the Southern Third of Africa . African Handbook of Birds , 1 : 2 – 38 .
- Rand , R. W. 1954 . Notes on the Birds of Marion Island . IBIS: , : 173 – 206 .
- Rand , R. W. 1962 . Sea-birds South of Madagascar . Ostrich: , 48 : 51
- Roberts , A. 1948 . The Birds of South Africa London
- Vincent , J. 1952 . A Checklist of the Birds of South Africa Cape Town