Anonymous - Engineering And Mining Journal Volume 40 - New paperback - X555z

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Anonymous - Edinburgh New Philosophical Journal Volume 25 - paperback - X555z

Anonymous - S.A. Mining and Engineering Journal 25 pt.2 no.1289 - N - X555z

Anonymous - S.A. Mining and Engineering Journal 25 pt.2 no.1280 - N - X555z

Anonymous - S.A. Mining and Engineering Journal 25 pt.2 no.1282 - N - X555z

Anonymous - S.A. Mining and Engineering Journal 25 pt.2 no.1288 - N - X555z