XII B4
2	The Iron and Steel Institute.Symposium on the Welding of Iron and Steel London     Second (final) supplementary advance copy (subject to correction) of the Papers of group 1, sub-group (a) of the Symposium on the Welding of Iron and Steel, may 2-3 1935 [Текст] / The Iron and Steel Institute.Symposium on the Welding of Iron and Steel London. — London, 1935. — 68 p.: ill., 20 pl.