REFERENCE MATERIAL CERTIFICATE OREAS MODEL: 992B FOR VERIFICATION OF THE CHEMICAL ANALYSIS PROCESSES 45% CONCENTRATION COPPER SULFIDE SAMPLE MARKETED IN ENVELOPES OF 50 GRAMS 601673
REFERENCE MATERIAL CERTIFICATE OREAS MODEL: 992B FOR VERIFICATION OF THE CHEMICAL ANALYSIS PROCESSES 45% CONCENTRATION COPPER SULFIDE SAMPLE MARKETED IN ENVELOPES OF 50 GRAMS 601673