| Referens | Rand, R.W. 1960 The biology of guano-producing seabirds. The distribution, abundance and feeding habits of the Cape Penguin, Spheniscus demersus, off the South-Western Coast of the Cape Province. Commerce and Industry, International Report 41:3-28. |
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| Ref. No. | 6053 |
| Språk | English |
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