May 18 (Reuters) - Sierra Metals Inc SMT.TO
* Sierra Metals Inc files for mixed shelf of up to C$75.0 million - sec filing Source text : Further company coverage: SMT.TO
May 18 (Reuters) - Sierra Metals Inc SMT.TO
* Sierra Metals Inc files for mixed shelf of up to C$75.0 million - sec filing Source text : Further company coverage: SMT.TO