Time factors of differentially preserved wood in two calcitic concretions in Pennsylvanian black shale from Indiana / Bertram G. Woodland -- and Catherine K. Richardson --.

v.33:no.10(1975)

A forest of the coal age / by B. E. Dahlgren, Acting Curator, Dept. of Botany.

no.14(1933)

Notes on the Siluro-Devonian Ischadites stellatus (Fagerstrom 1961), a Dasycladaceous Alga / [by] Matthew H. Nitecki.

v.23:no.3(1971)

Report on the fossil plants of the auriferous gravel deposits of the Sierra Nevada / by Léo Lesquereux.

v.6:no.2 (1878)