Template:Hale, 1976a
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- Hale, M.E., Jr. 1976. A Monograph of the Lichen Genus Pseudoparmelia Lynge (Parmeliaceae). Smithsonian Contributions to Botany 31: 1–62. DOI: 10.5479/si.0081024X.31
. hdl: 10088/6974
.