British Standards Institution. (1975). Methods for sampling and testing mineral aggregates, sands and fillers. The Institution.
Lua i Stíl Chicago (17ú heag.)British Standards Institution. Methods for Sampling and Testing Mineral Aggregates, Sands and Fillers. London: The Institution, 1975.
Lua MLA (8ú heag.)British Standards Institution. Methods for Sampling and Testing Mineral Aggregates, Sands and Fillers. The Institution, 1975.
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