Buhr, Robert2007-11-132007-11-131991http://hdl.handle.net/10625/29703Due to copyright restrictions, this item cannot be shared1 digital file (6 p.)application/pdfenCOPPERALLOYSFOUNDRIESPERUFIELD RESEARCHVisit to ITINTEC, Lima, Peru, Dec. 8-21, 1990Working Paper