O'Gara, P.J. 1917: A new leaf-spot disease of Polygonum persicaria. Mycologia 9(4): 248.
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| O'Gara, P.J. 1917: A new leaf-spot disease of Polygonum persicaria. Mycologia 9(4): 248. |
| O'Gara, P.J. 1917: A new leaf-spot disease of Polygonum persicaria. Mycologia 9(4): 248. |