cover photo: Agate, polished. Nowy Kościół, Lower Silesia, Poland. Sample 260x260xl30 mm. Photo R. Molenda...320x260xl IO mm. Agate, polished. ~owy Kościół, Lower Silesia, Poland. Photo 30x60 mm, sample 320x260xl IO mm...160xl50x30 mm. Sphalerite, polished. QIJ...7.1sz, Poland. Photo 30x70 mm, sample 160xl50x30 mm. , Sfale111...okaz 230xl50xl5 mm. Sphaleńte, polished. Olkusz, Poland. Photo 50xl40 mm, sample 230xl50xl5 mm. Fot. 6...the oldest and the best technical academies in Poland will celebrate its 90th jubilee in 2009. Mining |