Zygnematales -- Congresses. : Symposium on Desmids and Other Zygnematales (Second International Desmid Symposium), Lake Itasca, Minnesota, 21-25 September 1976 : proceedings = Verhandlungen / edited by Paul Biebel & Dieter Mollenhauer
1986
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Zygnematales -- Identification. : A key to the commoner Desmids of the English Lake District / by Edna M. Lind and Alan J. Brook ; illustrated by Joanna Langhorne, D. Williamson and A.J. Brook