(1957). Proceedings of the eleventh annual Ohio highway engineering conference 1957. Columbus: Ohio State University, Department of Civil Engineering.
Παραπομπή Chicago StyleProceedings of the Eleventh Annual Ohio Highway Engineering Conference 1957. Columbus: Ohio State University, Department of Civil Engineering, 1957.
Παραπομπή MLAProceedings of the Eleventh Annual Ohio Highway Engineering Conference 1957. Columbus: Ohio State University, Department of Civil Engineering, 1957.
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