(1956). Journal of the Prestressed Concrete Institute. Chicago, IL: Precast-Prestressed Concrete Institute.
Παραπομπή Chicago StyleJournal of the Prestressed Concrete Institute. Chicago, IL: Precast-Prestressed Concrete Institute, 1956.
Παραπομπή MLAJournal of the Prestressed Concrete Institute. Chicago, IL: Precast-Prestressed Concrete Institute, 1956.
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