URI
Notation
666.3/.7
Caption
Ceramics
Broader class
666  Glass industry. Ceramics. Cement and concrete
Narrower classes
666.3Ceramics in general. Ceramic raw materials
666.5Porcelain. China
666.6Stoneware. Earthenware (porous ceramic ware)
666.7Coarse ceramics. Heavy clayware. Refractories. Hard ceramic materials. Mixtures of ceramics and other materials