Hard Rock Mining with the Use of New Cutting Tools.Published in:Journal of Mining Science, 2003, v. 39, n. 4, p. 387, doi. 10.1023/B:JOMI.0000023191.07433.a5By:Kotwica, K.;Gospodarczyk, P.Publication type:Article
Emeralds recovered using new techniques at the Kagem mine, Zambia.Published in:Gems & Gemology, 2009, v. 45, n. 4, p. 298By:Lees, BryanPublication type:Article