John Muir Quotes about Earth
John Muir, Peter Browning (1988). “John Muir, in His Own Words: A Book of Quotations”, p.100, Great West Books
John Muir (2015). “JOHN MUIR Ultimate Collection: Travel Memoirs, Wilderness Essays, Environmental Studies & Letters (Illustrated): Picturesque California, The Treasures of the Yosemite, Our National Parks, Steep Trails, Travels in Alaska, A Thousand-mile Walk to the Gulf, Save the Redwoods, The Cruise of the Corwin and more”, p.1302, e-artnow
