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Cover of An Elementary Class-book of Practical Coal-mining by thomas hansom cockin

An Elementary Class-book of Practical Coal-mining

By Thomas Hansom Cockin

Cover of A Rudimentary Treatise on Coal and Coal Mining by sir warington wilkinson smyth,thomas foster brown

A Rudimentary Treatise on Coal and Coal Mining

By Sir Warington Wilkinson Smyth,Thomas Foster Brown