Ullstrup, A.J. 1944: Further studies on a species of Helminthosporium parasitizing cprn. Phytopathology 34(2): 214-222.
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| Ullstrup, A.J. 1944: Further studies on a species of Helminthosporium parasitizing cprn. Phytopathology 34(2): 214-222. |