(1976). AASHTO manual for bridge maintenance. American Association of State Highway and Transportation Officials.
Tohutoru Kātū Chicago (17th ed.)AASHTO Manual for Bridge Maintenance. Washington, D.C: American Association of State Highway and Transportation Officials, 1976.
Tohutoro MLA (9th ed.)AASHTO Manual for Bridge Maintenance. American Association of State Highway and Transportation Officials, 1976.
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