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Thomas Fenwick

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Elementary and Practical Treatise on Subterraneous Surveying And the Magnetic Variation of the Needle Also the Method of Conducting (1861)
Subterraneous Surveying with and Without the Magnetic Needle (Classic Reprint)
Subterraneous Surveying With and Without the Magnetic Needle (Classic Reprint)
Subterraneous Surveying With And Without The Magnetic Needle
Elementary And Practical Treatise On Subterraneous Surveying And The Magnetic Variation Of The Needle Also The Method Of Conducting (1861)