The quality of the environment in the Rosia of Jiu quarry as a result of the use of Caterpillar 323D L and 323D LN excavatorsBogdan Ioan Marc, Alexandra Stanimiresu Soica and Sorin Mihai RaduMATEC Web Conf., 342 (2021) 03011DOI: https://doi.org/10.1051/matecconf/202134203011