PITE, Danielle P., Kelly A. LANE, Anna K. HERMANN, Sarah A. SPAULDING, & Bruce P. FINNEY 2009 (Oct. 21) Historical abundance and morphology of Didymosphenia species in Naknek Lake, Alaska Acta Bot. Croat. 68(2): 183-197, 13 figs., 4 tables Didymosphenia geminata and D. clavaherculis |