4 · Society, Civilization, Culture
47 · crafts and industries
47B · handicrafts and industries
47B1 · handicrafts, craftsman at work
47B14 · handicrafts ~ clay, sand, chalk
47B14(+5) · handicrafts ~ clay, sand, chalk (+ basic industrial processes)
47B14(+56) ·
handicrafts ~ clay, sand, chalk (+ mixing, moulding, casting ~ industrial processes)