Institute of Welding. (1987). Directory of welding consumables tradenames 1987. The Welding Institute.
Lua i Stíl Chicago (17ú heag.)Institute of Welding. Directory of Welding Consumables Tradenames 1987. Cambridge,U.K.: The Welding Institute, 1987.
Lua MLA (9ú heag.)Institute of Welding. Directory of Welding Consumables Tradenames 1987. The Welding Institute, 1987.
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