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- Nylon1
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- Optical spectroscopy1
- Ostwald, Wilhelm, 1853-19321
- Paint industry and trade1
- Painting, Industrial1
- Paper chromatography1
- Paterson, David1
- Photometry1
- Pigments1
- Pigments industry1
- Pigments--Analysis1
- Plastering1
- Plastics1
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- Textile Color Card Association of the United States1
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- Textile industry1
- Vision disorders1