| http://www.w3.org/ns/prov#value | - Rather, it starts with the ???whole???, and estimates the whole for all countries and the world at large (without needing to know the specific parts that went into the whole in the first place).Given this caveat, this study covers ???treated clays that have been artificially activated with acid or other materials??? as defined by the North American Industrial Classification system or NAICS (pronou
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