American Society for Testing Materials & United States of America Standards Institute. (2005). Standard specification for chromium-vanadium alloy steel valve spring quality wire. American Society for Testing and Materials.
Cita Chicago Style (17a ed.)American Society for Testing Materials y United States of America Standards Institute. Standard Specification for Chromium-vanadium Alloy Steel Valve Spring Quality Wire. [Philadelphia, Pennsylvania]: American Society for Testing and Materials, 2005.
Cita MLA (8a ed.)American Society for Testing Materials y United States of America Standards Institute. Standard Specification for Chromium-vanadium Alloy Steel Valve Spring Quality Wire. American Society for Testing and Materials, 2005.
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