Grayson Lake nature trail.
APA Citation
United States. Army. Corps of Engineers. (1977). Grayson Lake nature trail. [Washington]: [Dept. of Defense, Dept. of the Army], Corps of Engineers.
MLA Citation
United States. Army. Corps of Engineers. Grayson Lake Nature Trail. [Washington]: [Dept. of Defense, Dept. of the Army], Corps of Engineers, 1977.
Warning: These citations may not always be complete (especially for serials).