Building code requirements for reinforced concrete (ACI 318-56) Adopted as a standard of the American Concrete Institute at its 52nd annual convention, February 21, 1956

"Building code requirements for reinforced concrete (ACI 318-56) Adopted as a standard of the American Concrete Institute at its 52nd annual convention, February 21, 1956"@en
"Building code requirements for reinforced concrete (ACI 318-56) : adopted as a standard of the American concrete institute at its 52d annual convention, February 21, 1956, as reported by Committee 318, ratified by letter ballot April 30, 1956"@en
"Building code requirements for reinforced concrete (ACI 318-56) Adopted as a standard of the American Concrete Institute at its 52nd annual convention, February 21, 1956, as reported by Committee 318. Ratified by letter ballot April 30, 1956"@en
"Building code requirements for reinforced concrete (ACI 318-56) Adopted as a Standard of the American Concrete Institute at its 52nd Annual Convention, February 21, 1956, as reported by Committee 318. Ratified by letter ballot April 30, 1956"@en