Epithermal Bicolor Black and White Calcite Spheres from Herja Ore Deposit, Baia Mare Neogene Ore District, Romania-Genetic Consi
Epithermal Bicolor Black and White Calcite Spheres from Herja Ore Deposit, Baia Mare Neogene Ore District, Romania-Genetic Consi
![The Project Gutenberg eBook of The Arts in The Middle Ages and at the Period of the Renaissance, by Paul Lacroix. The Project Gutenberg eBook of The Arts in The Middle Ages and at the Period of the Renaissance, by Paul Lacroix.](https://www.gutenberg.org/files/59924/59924-h/images/cover.jpg)