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3. Polyploidy in Sphaerocarpos (Abstr.);Allen;Proc. 6th Internat. Congr. Genetics,1932b
4. Bergdolt , E. 1926 Untersuchungen über Marchantiaceen
5. Die Regeneration (Aposporie) des Sporophyten von Anthoceros laevis.;Bornhagen;Biol. Zentralbl.,1926