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http://popart-highlights.mnhn.fr/index.html
and
http://popart-highlights.mnhn.fr/wp-content/uploads/2_Identification/1_What_plastics_are_in_my_collection/2_2_NeedForAPlasticReferenceSampleCollection.pdf
. Accessed 08 Aug 2018.
2. The Sneakerheads racing to save their kicks from decay.
https://www.wired.com/2015/05/sneakers/
. Accessed 08 Aug 2018.
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