On Physostoma elegans, Williamson, an archaic type of seed from the palaeozoic rocks
Oliver, Francis Wall, 1864-
Article
1909-01
Annals of botany
23
73--116
New York Botanical Garden, LuEsther T. Mertz Library
English
London, Academic Press [etc.],
DOI: https://doi.org/10.1093/oxfordjournals.aob.a089208
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