By Baur Bruno   Fröberg Lars   Müller Stefan W.   in Nova Hedwigia

ISSN:0029-5035|85|3-4|429-444

E. Schweizerbart'sche Verlagsbuchhandlung‎(2007)‎

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By Müller Stefan W   Rusterholz Hans-Peter   Baur Bruno   in Canadian Journal of Botony

ISSN:1480-3305|82|6|862-870

NRC Research Press‎(2004)‎

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