Solvent extraction of erbium(Ⅲ) with P507 in nitric acid solution and its separation from calcium(Ⅱ) and ferrum(Ⅲ)
NIU Qinglin, WANG Yundong
CIESC Journal . 2014, (1): 258 -263 .  DOI: 10.3969/j.issn.0438-1157.2014.01.033