Parmasto, E. 1959: Trudy Botanicheskogo Instituta Akademii Nauk SSSR 12
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| Parmasto, E. 1959: Trudy Botanicheskogo Instituta Akademii Nauk SSSR 12 |
| Parmasto, E. 1959: Trudy Botanicheskogo Instituta Akademii Nauk SSSR 12 |