HOFFMAN, E. G. (1996). Jig And Fixture Design Edward G. Kenneth. International Thomson.
Lua i Stíl Chicago (17ú heag.)HOFFMAN, Edward G. Jig And Fixture Design Edward G. Kenneth. International Thomson, 1996.
Lua MLA (8ú heag.)HOFFMAN, Edward G. Jig And Fixture Design Edward G. Kenneth. International Thomson, 1996.
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