Keywords: PlateII-Optical Diagrams.jpg en Plate II Optical Diagrams from The Fly-fisher's Entomology 1849 by Alfred Ronalds Extracted from http //www archive org/download/flyfishersentomo1849rona/flyfishersentomo1849rona pdf Alfred Ronalds 1849 PD-old The Fly-fisher's Entomology |