000			00463nam a2200145 a 4500
005			20220228110459.0
035			_aF8901000701206
084			_aCCA 45.016 1981
100			_aShirley, D.E.
245			_aImpurities in concreting aggregates / D.E. Shirley.
260			_aLondon : Cement and Concrete Association
300			_a7 p.
440			_aConstruction guide ; 45.016 / Cement and Concrete Associati-on
690			_aConcreto (agregados).Concreto - Propiedades.
999			_c53339 _d53339