1. BS 410-1976, Specification for Test sieves. British Standards Institution. 15 p.
2. BS 812-1975: Methods for sampling and testing of mineral aggregates (in four parts). British Standards Institution.
3. DEPARTMENT OF TRANSPORT, 1976: Specification for road and bridge works. Technical Merrorandum H16/76, specification requirements for aggregate properties and texture depth for bituminous surfacings to new roads.
4. DHIR R.K., RAMSAY D.M. and BALFOUR N., 1971: A study of the aggregate impact and crushing value test. J. Inst. Highway Eng. 18, 17–27.
5. EDWARDS A.G., 1967: Properties of concrete made with Scottish crushed rock aggregates. U.K. Building Research Station, Garston, Engineering Paper No: 42.