16 printed magazines and newsletters about the extraction, production, processing, and applications of non-fuel, non-metallic industrial minerals
41 educational services, namely, arranging and conducting symposia and conferences about the extraction, production, processing, and applications of non-fuel, non-metallic industrial minerals
42 computer services, namely, on-line magazines and newsletters about the extraction, production, processing, and applications of non-fuel, non-metallic industrial minerals