1. “Development of Mechanical Punching at the McGill Smelter”, by Leonard Larson, Kennecott Copper Corporation, AIME Annual Meeting, February 1950.
2. “Copper Converting Practice at Chino Mines Division of Kennecott Copper Corporation”, by M. K. Nicholson, P. L. Lockridge, and G. G. Beals, AIME Annual Meeting, February 1960.
3. “Converting Practice at Falconbridge Nickel Mines Limited”, by the Staff, CIM Annual Meeting, April 1964.
4. “The Use of Mechanical Tuyere Punchers on the Converters at Mufulira Copper Mines Limited”, by D. L. Turnbull, Eighth Commonwealth Mining and Metallurgical Congress, 1965.
5. “A Fourteen by Thirty-Two Foot Converter at the Noranda Smelter”, by G. C. McKerrow, AIME First Operating Metallurgy Conference and Exposition, Pittsburgh 1965.