Mine sampling and valuing :

By Herzig, Charles Simon.. . 60p. : 25 cm..

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Modern Mine valuation,/

By Burnham,Howard M.. U.S.A. Kessinger publishing, 1912 . xiv, 331, [7] p. , "This book is designed specifically as the foundation for a course in mine examination and valuation at the Michigan College of Mining and Technology."--Pref. to first edition. 19 cm..

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Mine sampling and valuing :

Modern Mine valuation,/