Spofford, C. M. (1928). The theory of structures (3rd ed.). New York: McGraw-Hill Book Company, Inc.
Παραπομπή Chicago StyleSpofford, Charles M. The Theory of Structures. 3rd ed. New York: McGraw-Hill Book Company, Inc, 1928.
Παραπομπή MLASpofford, Charles M. The Theory of Structures. 3rd ed. New York: McGraw-Hill Book Company, Inc, 1928.
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