Sierra Madre Gold and Silver Ltd. (TSXV: SM, OTCQX: SMDRF) (“Sierra Madre” or the “Company”) – https://www.commodity-tv.com/ondemand/companies/profil/sierra-madre-gold-silver/ – is pleased to announce that SEMARNAT, the federal Mexican regulatory agency in charge of environmental permitting, has approved modifications to the existing operating permit for the Guitarra Mine and Mill complex, located in the State of Mexico, […]
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