Brown, R. (2009). 50 years of polymer testing. iSmithers.
Lua i Stíl Chicago (17ú heag.)Brown, Roger. 50 Years of Polymer Testing. Shawbury, Shrewsbury, Shropshire: iSmithers, 2009.
Lua MLA (9ú heag.)Brown, Roger. 50 Years of Polymer Testing. iSmithers, 2009.
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