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Izaak Walton, Charles Cotton, Sir John Hawkins (1775). “The Complete Angler: Or, Contemplative Man's Recreation...: Prefixed, the Lives of the Author and Notes ...”, p.125
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”
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Izaak Walton, Charles Cotton (1824). “The Complete Angler of Izaak Walton and Charles Cotton: Estensively Embellished with Engravings on Copper and Wood, from Original Paintings and Drawings, by First-rate Artists, to which are Added, an Introductory Essay, the Linnœan Arangement of the Various River Fish Delineated in the Work, and Illustrative Notes”, p.57