Zodrow EL. Note on different kinds of attachments in trigonocarpalean (Medullosales) ovules from the Pennsylvanian Sydney Coalfield, Canada. atlgeo [Internet]. 2004 Oct. 10 [cited 2024 Nov. 29];40(2/3). Available from: https://journals.lib.unb.ca/index.php/ag/article/view/1039