On the double nature of the cycadean integument
Stopes, Marie Carmichael, 1880-1958
Article
1905-10
Annals of botany
19
561--566
New York Botanical Garden, LuEsther T. Mertz Library
English
London, Academic Press [etc.],
DOI: https://doi.org/10.1093/oxfordjournals.aob.a089028