- Adam Neville....The Writter of "Properties Of Concrete" and more concrete Books For Us
http://www.nbmcw.com/articles/concrete/564-an-overview-of-some-development-in-concrete-technology.html
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- Dr.L.R. Kadiyali
http://www.concretepavements.org/Membership/honorary/kadiyali.htm
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1 acre=43560 sq.ft.
1bigha= 62.5 desimile=27000 sq. ft. (aprox)
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