Nygaard, G. (1932). Contributions to our Knowledge of the Freshwater Algae of Africa. 9. Freshwater Algae and Phytoplankton from the Transvaal. Transactions of the Royal Society of South Africa. 20: 101-148, 48 figs.
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Nygaard, G.
1932
Contributions to our Knowledge of the Freshwater Algae of Africa. 9. Freshwater Algae and Phytoplankton from the Transvaal.