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2. Cornell-Probability, Statistics and Decision for Engineers and Scientists;Benjamin,1970
3. Basic Statistical Methods for Engineers and Scientist;Neville,1964
4. Indian Standaard Code of Practice for Plain and Reinforced Concrete IS 456-1964, ISI, New Delhi.
5. International recommendations for the design and construction of concrete structures;Bulletin D'Information Comite European Du Beton,1970