Classification
363 - Other social problems & services
3
338 - Production
2
394 - General customs
2
636 - Animal husbandry
2
304 - Factors affecting social behavior
1
307 - Communities
1
327 - International relations
1
331 - Labor economics
1
333 - Economics of land & energy
1
339 - Macroeconomics & related topics
1
362 - Social welfare problems & services
1
613 - Personal health & safety
1
630 - Agriculture & related technologies
1
631 - Techniques, equipment & materials
1
641 - Food & drink
1
647 - Management of public households
1
810 - American literature in English
1
939 - Other parts of ancient world to ca. 640
1