Classification
304 - Factors affecting social behavior
320 - Political science
330 - Economics
2
363 - Other social problems & services
380 - Commerce, communications & transportation
900 - History & geography
200 - Religion
1
300 - Social sciences
1
370 - Education
1
580 - Plants (Botany)
1
600 - Technology
1
700 - The arts; fine & decorative arts
1