William C Suran

William C. Suran is the author of "The Kolb Brothers of Grand Canyon: Being a Collection of Tales of High Adventure, Memorable Incidents, & Humorous Anecdotes (Grand Canyon Natural Histopry Association, 1991), and With the Wings of an Angel: A Biography of Ellsworth and Emery Kolb, Photographers of Grand Canyon (free download from website of Grand Canyon Pioneers)