1. Aagaad 1930 in Antarctic and Sub-antarctic Birds Sci. Res. Norwegian Antarctic Expd. et seq.
2. ‘I he genus;Falla;Pachyptila. Emu,1940
3. The phylogeny of the prions;Fleming;Emu,1941
4. Frfkman , R. L. 1947
5. Murphy , R. C. 1936 Oceanic Birds of South America Amer. Mus. Nat. Hist. New York