• 1 · Religion and Magic
• 2 · Nature
• 3 · Human Being, Man in General
• 4 · Society, Civilization, Culture
• 5 · Abstract Ideas and Concepts
• 6 · History
• 7 · Bible
• 8 · Literature
• 9 · Classical Mythology and Ancient History

• Top
• 4 · Society, Civilization, Culture
• 47 · crafts and industries
• 47B · handicrafts and industries
• 47B2 · industries

47B23 · industries ~ clay, sand, chalk, etc.

• 47B231 · brick works
• 47B232 · lime works
• 47B233 · cement works
• 47B234 · ceramics industry
• 47B235 · glass industry