Sierra Metals Reports Strong Q4-2018 Financial Results at its Sociedad Minera Corona Subsidiary in Peru https://www.newswire.ca/news-releases/sierra-metals-reports-strong-q4-2018-financial-results-at-its-sociedad-minera-corona-subsidiary-in-peru-841805426.html Sierra Metals Inc. Feb 15, 2019, 06:50 ET