A national park on the Potomac River.

APA Citation

Casselman, A. B. [from old catalog]., United States. National park service. [from old catalog]. (1917). A national park on the Potomac River. Washington: Govt. print. off..

MLA Citation

Casselman, Amos B. [from old catalog], and United States. National park service. [from old catalog]. A National Park On the Potomac River. Washington: Govt. print. off., 1917.