http://www.archive.org/details/efficiencybyreta00dobb Thesis (B.S.)--Armour Institute of Technology, 1911 Includes bibliographical references... Show morehttp://www.archive.org/details/efficiencybyreta00dobb Thesis (B.S.)--Armour Institute of Technology, 1911 Includes bibliographical references and index B.S. in Electrical Engineering, 1911 Show less