1. American Association of State Highway and Transportation Officials. (1983). Standard specification for highway bridges . AASHTO Washington D.C.
2. American Institute of Steel Construction. (1953). Iron and steel beams 1873 to 1952 . AISC Chicago Ill.
3. American Society for Metal. (1986). Atlas of fatigue curves H. E. Boyer ed. ASM Materials Park Ohio.
4. American Society for Testing and Materials. (1995). Annual book of ASTM standards . ASTM Philadelphia Pa.