Template:Hale, 1975a

• Hale, M.E., Jr. 1975. A Revision of the Lichen Genus Hypotrachyna (Parmeliaceae) in Tropical America. Smithsonian Contributions to Botany 25: 1–73. DOI: 10.5479/si.0081024X.25 . hdl: 10088/6977 .  
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  • RLL List # 93-43 / Rec.# 7472 – Recent Literature on Lichens