Short guide to working with stone riffles. Written by Ewald Kliegel, the developer of the gemstone riffles.
20 pages, illustrated throughout in color in practical A6 format.
Over 40 years on the market + own production in China and Indonesia
Short guide to working with stone riffles. Written by Ewald Kliegel, the developer of the gemstone riffles.
20 pages, illustrated throughout in color in practical A6 format.