Panayotova, M. and Panayotov, V. 2023. COPPER RECOVERY FROM LOW GRADE ORES, CONCENTRATES AND TECHNOGENIC WASTE BY AMMONIA LEACHING - AN OLD IDEA WITH PROMISING FUTURE: COPPER RECOVERY FROM LOW GRADE ORES, CONCENTRATES AND TECHNOGENIC WASTE BY AMMONIA LEACHING - AN OLD IDEA WITH PROMISING FUTURE. JOURNAL SCIENTIFIC AND APPLIED RESEARCH. 11, 1 (Mar. 2023), 10–34. DOI:https://doi.org/10.46687/jsar.v11i1.210.