Kelly, J. W. (1941). ACI manual of concrete inspection (4th ed.). Detroit: American Concrete Institute.
Παραπομπή Chicago StyleKelly, Joe Wallace. ACI Manual of Concrete Inspection. 4th ed. Detroit: American Concrete Institute, 1941.
Παραπομπή MLAKelly, Joe Wallace. ACI Manual of Concrete Inspection. 4th ed. Detroit: American Concrete Institute, 1941.
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