References
- Brooke , R. K. 1974 . The Spotted Crake Porzana porzana (Aves: Rallidae) in south-central and southern Africa. . Durban Mus. Novit , 10 : 43 – 52 .
- Dean , W. R. J. 1978 . Moult seasons of some Anatidae in the western Transvaal. . Ostrich , 49 : 76 – 84 .
- Dean , W. R.J. and Skead , D. M. 1978 . Plumage maintenance in some southern African Anatidae. . Ostrich , 49 : 199 – 203 .
- McLachlan , G. R. and Liversidge , R. 1978 . Roberts birds of South Africa Caw Town : Central News Agency. .
- Milstein , P. le S. 1975 . “ The biology of Barberspan, with special reference to the avifauna. ” . In Ostrich Suppl 10
- Schmitt , M. B. 1975 . Observations on the Black Crake in the southern Transvaal. . Ostrich , 46 : 129 – 138 .
- Schmitt , M. B. 1976 . Observations on the Cape Rail in the southern Transvaal. . Ostrich , 47 : 16 – 26 .
- Shewell , E. L. 1959 . The waterfowl of Barberspan. . Ostrich Suppl , 3 : 160 – 179 .
- Skead , D. M. and Dean , W. R. J. 1977 . Status of the Barberspan avifauna, 1971–1975. . Ostrich Suppl , 12 : 342
- Stresemann , E. and Stresemann , V. 1966 . Die Mauser der Vogel. . J. Orn , 107 : 1 – 445 .