On a palaeozoic fern, the Zygopteris grayi of Williamson
Scott, Dukinfield Henry, 1854-1934
Article
1912-01
Annals of botany
26
39--69
New York Botanical Garden, LuEsther T. Mertz Library
English
London, Academic Press [etc.],
DOI: https://doi.org/10.1093/oxfordjournals.aob.a089389
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