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2. “Solidification of Portland Cement,”;Williamson,1972
3. Creep of Concrete: Plain, Reinforced, Prestressed;Neville,1970
4. Properties of Concrete;Neville,1973
5. Hanson, J. A., “A 10-Year Study of Creep Properties of Concrete,” Concrete Laboratory Report No. Sp-38, U.S. Department of the Interior, Bureau of Reclamation, Denver, Colo. (1953).