Vassilkov, B.P. 1963: Botanicheskie Materialy Otdela Sporovykh Rastenii Botanicheskogo Instituta imeni V.L.Komarova, Akademii Nauk SSSR 16
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| Vassilkov, B.P. 1963: Botanicheskie Materialy Otdela Sporovykh Rastenii Botanicheskogo Instituta imeni V.L.Komarova, Akademii Nauk SSSR 16 |