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cdigital.dgb.uanl.mxcdigital.dgb.uanl.mx/la/1020056741/1020056741_081.pdf590 Purple copper ore, Puschkinite, 439 Pycnite, 432 Pyrargillite, 408 Pyrargyrite, 311 Pyreneite, 417 Pyrgom,
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