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Plagiothecium laetum Schimp.
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Ireland, Jr., R. R. 1969. A taxonomic revision of the genus Plagiothecium for North America, north of Mexico. Publ. Bot. (Ottawa) 1: i–vii, 1–118.
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Ignatov, M. S. & O. M. Afonina. 1992. Checklist of mosses of the former USSR. Arctoa 1: 1–85.
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Flora of North America Editorial Committee. 2014. Bryophyta, part 2. 28: i–xxii, 1–702. In Fl. N. Amer.. Oxford University Press, New York.
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