1. Biermann, W. H., and Voous, K. H., Birds Observed and Collected during the Whaling Expeditions of the Willem Barendsz in the Antarctic (1946–1947 and 1947–48).
2. Dell, R. K., B.A.N.Z. Antarctic Res. Exp. 1929–1931, Ser. B, 8 (4), 91 (1959).
3. Murphy, R. C., Oceanic Birds of South America, 1 and 2 (New York, 1936).
4. Bouxin, J., and LeGendre, R., Ann. Inst. océanogr. Paris, 16 (1), 1 (1936).
5. Rees, W. J., and Maul, G. E., Bull. Brit. Mus. (Nat. Hist.), 3 (6), 257 (1956).