Sheet metal workers' manual : a complete, prractical instruction book on the sheet metal industry, machinery and tools, and related subjects, including the oxy-acetylen welding and cutting process with a special course in elementary and advanced sheet metal work and pattern drafting for technical and trade school instructors and students; also for reference and study by sheet metal workers and apprentices / L. Broemel, James S. Daugherty. Broemel, L. (Louis), 1885- Daugherty, James S. (James Sharkey), 1866- Sheet-metal work. TS250 .B85 1942 624.182 BRS Includes index. Chicago : Frederick J. Drake, c1942. c1942. 1942 Text [5]-550, [12] p. : eng