Continuous hollow girder concrete bridges: Concrete for permanence. Portland Cement Association.
Chicago Style (17th ed.) CitationContinuous Hollow Girder Concrete Bridges: Concrete for Permanence. Chicago: Portland Cement Association.
MLA (9th ed.) CitationContinuous Hollow Girder Concrete Bridges: Concrete for Permanence. Portland Cement Association.
Warning: These citations may not always be 100% accurate.