Yosemite Valley--El Portal comprehensive design :
project summary.
APA Citation
United States. National Park Service. Denver Service Center. (1987). Yosemite Valley--El Portal comprehensive design: project summary. [Denver]: Denver Service Center, National Park Service, U.S. Dept. of the Interior.
MLA Citation
United States. National Park Service. Denver Service Center. Yosemite Valley--El Portal Comprehensive Design: Project Summary. [Denver]: Denver Service Center, National Park Service, U.S. Dept. of the Interior, 1987.
Warning: These citations may not always be complete (especially for serials).