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2. The Utilization, Processing and Demand for Rubber Wood as a Source of Wood supply;Balsiger,2000
3. Global normalization factors for ILCD compliant midpoint impact categories;Benini,2015
4. Board of Investment Thailand. Thailand’s Rubber Statistic Report 2016;BOI,2016
5. Metal Sheets for Various Applications. Product Environmental Footprint Category Rules (PEFCR and PEF);Bollen,2016