Crawford, R. Plastics engineering (3a edición.). Butterworth.
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Tohutoru Kātū Chicago (17th ed.)
Crawford, R.J. Plastics Engineering. 3a edición. Woburn, EUA: Butterworth.
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Tohutoro MLA (9th ed.)
Crawford, R.J. Plastics Engineering. 3a edición. Butterworth.
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