Jančev, S., & 		Karamačoska, B.
(2017).
 Mass-spectrometric examinations (δ34S) of different baryte, pyrite, galena, sphalerite samples from the ore occurrences in the mixed series at Nežilovo village, Macedonia.
<em>Acta Musei Macedonici Scientiarum Naturalium, 20</em>(1), 9-14.
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