Template:Lettau, 1958a

• Lettau, G. 1958. Flechten aus Mitteleuropa XIII. Feddes Repertorium Specierum Novarum Regni Vegetabilis 61(1): 1–73. DOI: 10.1002/fedr.19580610102 .  
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  • RLL List # 38 / Rec.# 11396 – Recent Literature on Lichens