(1959). Proceedings of the thirteenth annual Ohio highway engineering conference 1959. Columbus: Ohio State University, Department of Civil Engineering.
Παραπομπή Chicago StyleProceedings of the Thirteenth Annual Ohio Highway Engineering Conference 1959. Columbus: Ohio State University, Department of Civil Engineering, 1959.
Παραπομπή MLAProceedings of the Thirteenth Annual Ohio Highway Engineering Conference 1959. Columbus: Ohio State University, Department of Civil Engineering, 1959.
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