A Treatise on Coal Mining: Supplementary Volume; Percussive and Rotary Boring, Compressed-Air Coal-Cutting Machinery, Dynamos and Motors, Electric ... and Lighting, Electric Coal-Cutting Machinery

by International Correspondence Schools Paperback details (UK). ISBN: 978-0-282-02857-2 ISBN-10: 0-282-02857-9 Forgotten Books · 2019