Encyclopedia of 20th-Century Technology, Volume 1 - A-LA. Hempstead Colin · First published 2005Open the Tome
Encyclopedia of 20th-Century TechnologyColin Hempstead, William Worthington · First published 2004Open the Tome
Encyclopedia of 20th-Century Technology, Volume 2 M-Z IndexColin Hempstead, William E. Worthington · First published 2004Open the Tome
A Victorian scientist and engineerColin Hempstead, Gillian Cookson · First published 2000Open the Tome
