Classification
330 - Economics
49
995 - Melanesia; New Guinea
5
301 - Sociology & anthropology
4
333 - Economics of land & energy
4
363 - Other social problems & services
3
320 - Political science
2
304 - Factors affecting social behavior
1
305 - Social groups
1
336 - Public finance
1
372 - Elementary education
1
577 - Ecology
1
610 - Medicine & health
1
910 - Geography & travel
1
940 - History of Europe
1
993 - New Zealand
1