High-Tension Underground Electric Cables: A Practical Treatise for Engineers

The Underground Dictionary, Eugene Landy, first printing

Dean Koontz The Underground Lifestyles Handbook 1st edition 1970 NF+ RARE!

Ninja Hero's: The Underground Dragon Engine

Rock Mechanics for Underground Mining. Mining Engineering

NEW YORK CITY; UNDERGROUND WORKINGS. AN ORIGINAL ARTICLE FROM THE ENGINEERING MA

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Harriet Tubman: Engineer of the Underground Railroad: Engineer of the...