Contributions to the Knowledge of the Older Mesozoic Flora of Virginia.
Washington, 1883. First edition, 4to, (xii), 144 pp. 54 plates. Original cloth, spine ends and corners worn, some marks. More
Washington, 1883. First edition, 4to, (xii), 144 pp. 54 plates. Original cloth, spine ends and corners worn, some marks. More