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On the Variation of Staurastrum Bibrachiatum Reinsch as an Exemple of Variability in a Desmid Species

Rolf Grönblad

出版	Societas pro fauna et flora Fennica, 1955
URL	http://books.google.com.hk/books?id=9eOxHAAACAAJ&hl=&source=gbs_api