Pennsylvanian flora of Illinois as revealed in coal balls. I
Reference LSID: urn:lsid:plantfossilnames.org:ref:131
Authors: R. Graham
Full citation: Graham, R. (1934): Pennsylvanian flora of Illinois as revealed in coal balls. I. – Botanical Gazette 95(3): 453–476.
Journal: Botanical Gazette
Link to article: https://www.jstor.org/stable/2471417?Search=yes&resultItemClick=true&searchText=Pennsylvanian&searchText=flora&searchText=of&searchText=Illinois&searchUri=%2Faction%2FdoBasicSearch%3Ffilter%3D%26amp%3BQuery%3DPennsylvanian%2Bflora%2Bof%2BIllinois&refreqid