American Association of State Highway Officials. (1949). Policy on maintenance of shoulders, road approaches and sidewalks: Policy on maintenance of roadsides. Washington: American Association of State Highway Officials.
Chicago Style CitationAmerican Association of State Highway Officials. Policy On Maintenance of Shoulders, Road Approaches and Sidewalks: Policy On Maintenance of Roadsides. Washington: American Association of State Highway Officials, 1949.
MLA CitationAmerican Association of State Highway Officials. Policy On Maintenance of Shoulders, Road Approaches and Sidewalks: Policy On Maintenance of Roadsides. Washington: American Association of State Highway Officials, 1949.
Warning: These citations may not always be 100% accurate.