Lycopsid, stems, roots, sphenopsid, fructifications, stems, upper Freeport Coal, southeastern Ohio
Author:M.L. Abbott Subject:Lycopsid stems and roots and sphenopsid fructifications and stems from the upper Freeport Coal of southeastern Ohio Year:1968 Volume:6 Pages:50 pp., 19 pls. Issue:38 ISBN:978-0-87710-339-4 |
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