Technical Encyclopedia, Volume 2: Gelleflinta Drilling Shell. In Russian (ask us if in doubt)/Tekhnicheskaya entsiklopediya, Tom 2: Buril'naya rakovina-Gelleflinta. Dictionary of all branches of technology and related sciences. About 7,000 pages, 50,000 articles and terms, and over 12,000 illustrations and design drawings. St. Petersburg Enlightenment 1912. SKUalb68ec79287b911a29.