Não informado. (1973). Plastics Engineering. Society of Plastics Engineers.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Plastics Engineering. Brookfield, CT: Society of Plastics Engineers, 1973.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Plastics Engineering. Society of Plastics Engineers, 1973.
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