The Potomac Formation in Virginia

The Potomac Or Younger Mesozoic Flora: Volume 15, Part 1

Contributions to the Knowledge of the Older Mesozoic Flora of Virginia

Introductory Lecture: Volume 6

The Potomac Or Younger Mesozoic Flora

Contributions to the Knowledge of the Older Mesozoic Flora of Virginia

Contributions to the Knowledge of the Older Mesozoic Flora of Virginia

The Potomac Formation in Virginia

The Potomac Or Younger Mesozoic Flora: Part 1

The Permian Or Upper Carboniferous Flora of West Virginia and S.W. Pennsylvania

Resources of West Virginia

Status of the Mesozoic Floras of the United States: Part 1

Status of the Mesozoic Floras of the United States: First Paper: The Older Mesozoic

Status of the Mesozoic Floras of the United States: Plates

Contributions Toward a Monograph of the Noctuidæ of Boreal America: Revision of the Genus Cucullia; Revision of the Dicopinæ; Revision of Xylomiges and Morrisonia, Volume 15