Gray, W. S., & Manning, G. P. (1953). Reinforced concrete water towers, bunkers, silos, and gantries (3rd ed.). London: Concrete Publications Limited.
Παραπομπή Chicago StyleGray, W. S., and G. P. Manning. Reinforced Concrete Water Towers, Bunkers, Silos, and Gantries. 3rd ed. London: Concrete Publications Limited, 1953.
Παραπομπή MLAGray, W. S., and G. P. Manning. Reinforced Concrete Water Towers, Bunkers, Silos, and Gantries. 3rd ed. London: Concrete Publications Limited, 1953.
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