Cooke, M.C. 1883: On Sphaerella and its allies. Journal of Botany, British and Foreign 21: 67-71, 106-110, 136-139.
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| Cooke, M.C. 1883: On Sphaerella and its allies. Journal of Botany, British and Foreign 21: 67-71, 106-110, 136-139. |