المصادر

2 من أصل 3

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• Sally Humphreys, 2004. Expert Overviews Covering the Science and Technology of Rubber and Plastics. Rapra Technology limited.
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• Moawia Mohammed Ahmed Elberier Group of Companies. New Industrial Area. Allamap. P. O. BOX 11944. Khartoum, Sudan. Khartoum. Sudan. 2011. moawiaelberier.com
• Noor Poultry Company. Arkweet, Ebid Khtim Street, Khartoum, Sudan. (2011).
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• deoni.gov.uk/niea/waste Packaging Definition 2010.