This stirring panopticon by the West s first tier of nature photographers rings the full diapason of Colorado s muscular landscape from sublimity to Collegiate Peaks and Weminuche Wildernesses; Pawnee National Grasslands; Curecanti National Recreation Area; Great Sand Dunes and Colorado National Monuments; Rocky Mountain National Park; and White River, San Isabel, Rio Grande, Uncompahgre, Gunnison, Grand Mesa, San Juan, and Arapahoe National Forests.
Various is the correct author for any book with multiple unknown authors, and is acceptable for books with multiple known authors, especially if not all are known or the list is very long (over 50).
If an editor is known, however, Various is not necessary. List the name of the editor as the primary author (with role "editor"). Contributing authors' names follow it.
Note: WorldCat is an excellent resource for finding author information and contents of anthologies.