Template:Trass, 1978a

• Trass, H. 1979 ['1978']. New and rare taxa of Cladoniaceae in the lichen-flora of the U.S.S.R. Folia Cryptogamica Estonica 11: 1–6. FCE (PDF)  
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  • RLL Suppl. Rec.# 83 – Recent Literature on Lichens