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3. Arnold G. Werkmeister S. and Alabaster D. (2008). “Performance tests for road aggregates and alternative materials.” Land Transport New Zealand Research Rep. 335 Wellington New Zealand 〈http://www.nzta.govt.nz/resources/research/reports/335/docs/335.pdf〉 (Jul. 4 2010).
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5. ASTM. (2005b). “Standard test method for soundness of aggregates by use of sodium sulfate or magnesium sulfate.” C88 West Conshohocken PA.