Template:Keissler, 1925a

• Keissler, C. 1925. Schedae ad „Kryptogamas Exsiccatas“ editae a Museo historiae naturalis Vindobonensi (olim Museum Palatinum). Cent. XXIX. Annalen des Naturhistorischen Museums in Wien 38: 134–149. JSTOR . ZOBODAT (PDF)  
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  • Mattick Rec.# 27858 – Recent Literature on Lichens