PERAY, K. E. (1979). Cement Manufacturer's Handbook. Chemical Publishing Co.
Lua i Stíl Chicago (17ú heag.)PERAY, Kurt E. Cement Manufacturer's Handbook. Chemical Publishing Co, 1979.
Lua MLA (8ú heag.)PERAY, Kurt E. Cement Manufacturer's Handbook. Chemical Publishing Co, 1979.
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