Ray Bergman (1938). “Trout: Fly Plates in Full Color Painted by Edgar Burke; Photographs of Fly Tying by Charles S. Krug; Also Many Diagrams in Line by Ivin Sickles”
John Muir (2015). “John Muir’s Incredible Travel Memoirs: A Thousand-Mile Walk to the Gulf, My First Summer in the Sierra, The Mountains of California, Travels in Alaska, Steep Trails… (Illustrated): Adventure Memoirs & Wilderness Studies from the Naturalist, Environmental Philosopher and Early Advocate of Preservation of Wilderness, the Author of The Yosemite and Picturesque California”, p.14, e-artnow