An Interactive Method for Calculating the Maximum Efficiency (Organic Yield) in the Processing of the Tailing Dumps in Jiu Valley - MARIȚA, Mihaela Olga; CIOCAN, Viorica; BRÎNAȘ, Ildiko (The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, 2022)